- Policy & History
- History of the U.S. and Thailand
The United States and Thailand established relations in 1818 and signed a Treaty of Amity and Commerce in 1833, formalizing diplomatic relations. The Treaty of 1833 was the United States’ first treaty with a country in Asia, making Thailand truly our oldest friend in the region.
We invite you to learn more about the long and special history of U.S.-Thai relations through the information and resources presented here.
A Timeline of Key Events in U.S.-Thai Relations
The Foundations: 1818 – 1880
1818 First American ship reaches Bangkok.
1833 March 18 His Majesty King Nang Klao (Rama III) grants an audience to American envoy Edmund Roberts.
- March 20 Siam and the U.S. sign the Treaty of Amity and Commerce in Bangkok.
1835 July 18 Reverend Dr. Dan Beach Bradley arrives in Bangkok with the first Siamese printing press from Singapore.
1837 July 1 The first Protestant church in Bangkok was founded with the help of American missionaries. Reverend William Dean serves as its first pastor.
1844 July 4 Dr. Dan Beach Bradley begins publishing The Bangkok Recorder, the first Thai-language newspaper in Siam.
1850 April Joseph Balestier sent to Bangkok as a special envoy to negotiate a new commercial treaty with the government of Siam.
1856 May The United States appoints first Consul to Siam, the Reverend Stephen Mattoon.
1856 May 29 Siam and the United States sign a new Treaty of Amity, Commerce, and Navigation, know as the Harris Treaty, replacing the treaty of 1833.
1861 February 14 His Majesty King Mongkut writes to President James Buchanan offering domesticated elephants to be used as beasts of burden. President Abraham Lincoln respectfully declines the offer in a letter received one year later.
1879 April Former President Ulysses S. Grant visits Siam.
1881 July 13 United States appoints John A. Halderman as first American envoy to Siam with title of Consul General. Siam appoints Prince Prisdang Jumsai as the first Minister to the U.S., residing in London.
1884 May 6 Prince Nares Warariddhi, Chief of the Siamese Mission to the United States, presents his credentials to President Chester A. Arthur.
1894 Standard Oil Company of New York (Socony) opens a branch office in Bangkok.
1902 October 11 Crown Prince Vajiravudh, who later was crowned King Rama VI, visits the United States (PDF 33KB).
1903 Siam appoints American, Edward H. Strobel (PDF 65KB), as General Advisor.
1920 December 16 The United States and Siam sign a new Treaty and Protocol, abolishing extraterritoriality for American subjects and easing trade.
1923 Francis B. Sayre becomes Advisor to the Ministry of Foreign Affairs of Siam.
1926 Francis B. Sayre represents Siam in negotiations with European countries to eliminate extraterritoriality; Siam subsequently concludes several treaties with European countries along lines of the 1920 Siam-U.S. Treaty and Protocol.
1927 December 5 His Royal Highness Prince Bhumibol Adulyadej is born at Mount Auburn Hospital in Cambridge, Massachusetts.
1931 April Their Majesties King Prajadhipok and Queen Rambhai Barni visit the United States.
1937 November 13 The United States and Siam sign the Treaty of Friendship, Commerce, and Navigation in Bangkok.
1939 The Phibun administration officially changes the country’s name from Siam to Muang Thai (Land of the Free) or Thailand.
1941 December 8 Japan invades Thailand following Japan’s declaration of war on the U.S. and Britain.
1942 January 25 Prime Minister Field Marshal Phibun signs a mutual defense pact with Japan and declares war against the United States and Britain. Seni Pramoj, the Thai Ambassador to Washington, refuses his government’s orders to deliver the declaration of war. The United States refrains from declaring war on Thailand.
1945 August 14 Japan surrenders unconditionally to the Allies.
- August 21 U.S. Secretary of State James Byrnes accepts Thailand’s Peace Proclamation. U.S. advocates to Allies that Thailand not be treated as enemy combatant.
1946 December 16 Thailand becomes a member of the United Nations.
1947 April 10 Mr. Edwin F. Stanton is appointed as the first U.S. envoy with rank of Ambassador to Thailand.
1948 Jim Thompson founds the Thai Silk Company.
1950 July 1 Thai-U.S. Educational and Cultural Exchange Agreement signed.
- August Thailand deploys soldiers from the 21st Infantry Regiment to Korea to fight alongside the US 1st Cavalry Division
- September 19 Thai-U.S. Economic and Technical Cooperation Agreement signed.
- October 17 Thailand and the United States sign an agreement on military assistance.
1953 September Joint US Military Advisory Group – Thailand established in Bangkok.
1954 February 19 Thailand and the United States join other signatories of the Manila Pact to form the Southeast Asian Treaty Organization (SEATO).
1955 May Prime Minister Field Marshal Phibun visits the United States.
1956 American Chamber of Commerce in Thailand is founded.
1958 July 10 First section of “Friendship Highway,” shortening the Bangkok-Korat drive by 150 kilometers, built with aid from the United States.
1960 June Their Majesties King Bhumibol and Queen Sirikit visit the United States, accompanied by their four children.
1961 March President John F Kennedy dispatches a 500-man Marine helicopter detachment to Udorn. || March The American Field Service (AFS) starts exchanges between American and Thai high school students.
1962 January First American Peace Corps Volunteers arrive in Thailand. || March 6 Rusk-Thanat Joint Statement signed in Washington pledging U.S. support for Thailand’s defense. May 17 The 3rd Marine Expeditionary Unit landed in Thailand. || July 30 Withdrawal of the 5,000 marines from 3rd Unit is complete.
1964 First U.S. military forces are based in Thailand.
1966 May 29 Thai Minister of Foreign Affairs Thanat Khoman and U.S. Ambassador Graham Martin sign a new Treaty of Amity and Economic Relations in Bangkok.|| October 27-30 President and Mrs. Johnson make a State Visit to Thailand. King Bhumibol presents the President with an honorary doctorate in Political Science from Chulalongkorn University.
1967 June Their Majesties King Bhumibol and Queen Sirikit visit the United States a second time.|| June 27 President Lyndon B. Johnson hosts His Majesties for a state dinner at the White House.
1969 July President Richard M. Nixon visits Bangkok and is presented a key to the city by Chalit Kulkanthorn, Mayor of Bangkok.
1971 October 14 California Governor Ronald Reagan visits Bangkok as President Nixon’s representative.
1975 March 15 Prime Minister M.R. Kukrit Pramoj asks the United States to withdraw all troops from Thailand.
1976 July 20 The United States completes its military withdrawal from Thailand.
1979 November First Lady Rosalynn Carter visits Thailand to assess refugee situation.
1980 February-July Crown Prince Maha Vajiralongkorn receives military training at United States Army Institute for Military Assistance, Fort Bragg, North Carolina.
1981 November 9 Queen Sirikit receives the first Save the Children Distinguished Service Award in New York.
1982 June Thailand and United States stage their first annual Cobra Gold joint military exercise.
1983 March 20 While receiving air force training in the United States, Crown Prince Maha Vajiralongkorn represents Thailand in commemorating the 150th anniversary of the first Treaty of Amity and Commerce.
1984 April 13 The United States and Thailand sign the Agreement on Cooperation in Science and Technology aimed at broadening cooperation in the field science and technology.
1985 March 5-27 Queen Sirikit visits the United States to open Supplementary Occupations and Related Techniques (SUPPORT) exhibits.|| March 14 Asia Society awards Queen Sirikit its Humanitarian Award in New York.
1986 May 2-5 First Lady Nancy Reagan visits Malaysia and Thailand; While in Bangkok she receives an award for her anti-drug efforts.
1987 January 9 Ambassador William A. Brown and Minister of Defense Air Chief Marshal Panieng Kantarat sign War Reserve Stockpile Agreement.
1989 May Vice President and Mrs. Quayle visit Thailand.
1990 June Prime Minister Chatichai Choonhavan meets President Bush during his official visit to the United States. Thailand and the Centers for Disease Control (CDC) join in full-scale AIDS research in Thailand.
1992 October-November Queen Sirikit, the Crown Prince Maha Vajiralongkorn, and Princess Chulabhorn are hosted at the White House by President and Mrs. Bush.
1994 October 8 Vice President Al Gore and Deputy Prime Minister Amnuay Viravan sign an agreement on protecting the environment. || December 6 Mr. Anand Panyarachun, former Prime Minister of Thailand, becomes the first chairman of the Kenan Institute Asia.
1996 May 7 The HIV/AIDS collaboration, a joint intervention research activity between the Centers for Disease Control (CDC) and the Thai Ministry of Public Health, opens its new office and lab in Nonthaburi.|| May 8 Foreign Minister Kasem S. Kasemsri and Ambassador William H. Itoh signed a bilateral Air Services Agreement expanding aviation rights of the airlines of the United States and Thailand.|| May 14 Deputy Prime Minister Amnuay Virawan and U.S. Ambassador Itoh open the new U.S. Embassy at 120-122 Wireless road.
1996 November 26-27 President and Mrs. Clinton visit Thailand in celebration of the 50th anniversary of His Majesty’s accession to the throne. President Clinton is awarded a Degree of Doctor of Economics honoris causa from Chulalongkorn University.|| November 26 President Clinton and Prime Minister Banharn witness the signing of the bilateral taxation treaty, ensuring the prevention of double taxation of U.S. companies in Thailand.
1997 July 11 President Clinton deploys a task force of 550 U.S. military personnel to Utapao Air Base in Thailand.|| November 19 Princess Maha Chakri Sirindhorn makes a visit to the United States Information Service (USIS) at the U.S. Embassy in Bangkok.
1998 March 11-15 Prime Minister Chuan Leekpai visits the United States.
- September 30 Thai Foreign Minister Surin Pitsuwan and U.S. Ambassador to Thailand William H. Itoh sign agreement to establish International Law Enforcement Academy (ILEA), Bangkok.
- November 3 Princess Maha Chakri Sirindhorn witnesses the launch of the space shuttle Discovery at the Kennedy Space Center in Florida.
1999 March 3-4 Secretary of State Madeleine Korbel Albright visits Thailand.
- September 30 Deputy Prime Minister Trairong Suwankiri and U.S. Ambassador Richard E. Hecklinger sign agreement to support the GLOBE program in Thailand.
- November 19 Princess Maha Chakri Sirindhorn visits the U.S. Embassy in Bangkok’s Public Affairs Section.
2000 July 1 The Fulbright Program in Thailand celebrates its 50th Anniversary.
- July 26-29 Secretary of State Albright participates in the seventh ASEAN Regional Forum and the ASEAN Post-Ministerial Conference held in Bangkok.
2001 January 26 The U.S. Consulate General in Chiang Mai celebrates its 50th anniversary.
- April 19 Thai Foreign Minister Surakiart Sathirathai meets with U.S. Secretary of State Colin L. Powell in Washington D.C.
- July 2 The Kingdom of Thailand awarded the 2001 Franklin Delano Roosevelt International Disability Award at the United Nations in New York.
- December 13-19 Thai Prime Minister Thaksin Shinawatra visits the United States. President Bush and Prime Minister Thaksin release a Joint Statement between the United States of America and the Kingdom of Thailand.
2002 January 20 Peace Corps Thailand celebrates its 40th anniversary.
- July 29 Secretary of State Colin L. Powell visits Thailand.
- October 4-16 Queen Sirikit visits the United States.
- October 23 United States and Thailand sign a Trade and Investment Framework Agreement (TIFA).
2003 July 1 USTDA awards US$139,887 grant to Aeronautical Radio of Thailand Ltd to fund a feasibility study.
- October 18 U.S. Secretary of State Colin Powell and Thai Foreign Minister Surakiart Sathirathai sign the U.S.-Thailand Air Cargo Agreement in Bangkok.
- October 18-21 President Bush visits Thailand to attend the 11th Asian Pacific Economic Cooperation (APEC) Summit meeting.
- December 30 President Bush formally designates Thailand as a Major Non-NATO Ally (MNNA).
2004 February 12 United States Trade Representative (USTR) Robert B. Zoellick formally notifies congress of intent to negotiate a free trade agreement (FTA) with Thailand.
- December 26 Indian Ocean tsunami devastates the coast of Thailand, leaving more than 1,473 dead and 3,000 injured.
- December 30 Thailand grants the United States permission to use Utapao Air Base as a regional hub for aid efforts.
2005 January 4 Secretary of State Colin Powell and Governor Jeb Bush visit Thailand in support of tsunami relief efforts.
- July 10-11 Secretary of State Condoleezza Rice travels to Phuket to survey tsunami recovery and reconstruction.
- September 19 The United States and Thailand sign an Open Skies Aviation Agreement.
2006 July 18 Princess Bajrakitiyabha Mahidol of Thailand dedicates a gift of books from the Thai Royal Family to the University of Oregon Libraries.
- September 19 Prime Minster Thaksin Shinawatra is deposed in a coup d’etat.
- October 23 His Majesty King Bhumibol Adulyadej becomes the first recipient of the World Food Prize Borlaug Medallion for his humanitarian efforts.
- December 12 Former President George H.W. Bush and Mrs. Bush visits Thailand pledging continued support for tsunami relief efforts.
2007 February 21 Thailand and the United States launch a public awareness campaign to eradicate illegal wildlife trade in Southeast Asia.
- July 5 Thai artists participate in Mekong River cultural exhibit at the Smithsonian Folklife Festival in the U.S.
- September 10-14 The U.S. supports a series of disaster preparedness mini-exercises and trainings at the Port of Laem Chabang.
- November 10-13 The Preservation Hall Jazz Band from New Orleans, Louisiana, plays a series of shows in Thailand in honor of His Majesty the King’s 80th Birthday.
2008 January 11 Ambassador Eric G. John assumes duties as the U.S. Ambassador to the Kingdom of Thailand.
- February 28 to March 2 Assistant Secretary of State for East Asian and Pacific Affairs, Ambassador Christopher Hill, visits Bangkok.
- June 1 Defense Secretary Robert M. Gates visits Thailand. During his visit, Gates reaffirmed that the military-to-military relationship between the U.S. and Thailand is based on shared democratic principles.
- June 22 Relief efforts for Cyclone Nargis in Burma conclude. The U.S. flew 185 missions from Utapao Royal Thai Naval Air Station that delivered over 1,600 tons of U.S. and Thai relief supplies to assist victims of the disaster.
- July 6-10 Ms. Alina L. Romanowski , Deputy Assistant Secretary of State for Professional and Cultural Exchanges in the Bureau of Educational and Cultural Affairs, visits Thailand to review professional, youth, and sports exchange programs between Thailand and the United States.
- August President George W. Bush visits Thailand.
2009 March 9 The U.S. Embassy and the Royal Thai Government launch a new “Wildlife Trafficking Stops Here” campaign, a joint effort between the Airport of Thailand Public Company Limited (AOT) and the Ministry of Natural Resources and Environment with the generous support of the U.S. Agency for International Development and the Department of State.
- July 21-23 Secretary of State Hillary Clinton visits Bangkok and Phuket, underscoring the importance of our alliance and our bilateral relationship.
- December Ambassador Eric John presented 20,000 calendars to the Thai Department of Livestock Development in a joint US-Thai effort to raise awareness of animal health
2010 July The Fulbright Program in Thailand celebrates its 60th Anniversary.
- July U.S. Embassy Bangkok and the Royal Thai Government announced a new joint initiative, the Thai-U.S. Creative Partnership, to bring our relationship to new heights. This initiative will strengthen existing collaboration and identify new partnerships between our public and private sectors.
- November 6 The Preservation Jazz Hall Band from New Orleans, Louisiana, joins Her Royal Highness Princess Maha Chakri Sirindhorn for a special performance for His Majesty in honor of his 83rd birthday.
2011 January 10 Ambassador Kristie A. Kenney assumes duty as the U.S. Ambassador to the Kingdom of Thailand.
- January 21 Admiral Patrick Walsh, Commander of the U.S. Pacific Fleet, meets with senior officials of the Royal Thai Navy at their headquarters in Bangkok to discuss bilateral relations and regional security issues.
- February 7 – 18 Cobra Gold, one of the largest multilateral exercises in the world, celebrates its 30th anniversary.
- May 31 Senator John McCain visits Mae Tao Clinic and Mae La Refugee Camp in Mae Sot.
- September 15 Assistant Secretary of State for International Narcotics and Law Enforcement Affairs (INL) William Brownfield visits Thailand to oversee U.S.-Thai collaboration in combating narcotic crimes.
- October 10 Assistant Secretary of State for East Asian and Pacific Affairs Kurt Campbell visits the Institute of Security and International Studies at Chulalongkorn University to give a special lecture on U.S. engagement in Asia.
- November 16-17 Secretary of State Hillary Clinton visits Bangkok and meets with Prime Minister Yingluck Shinawatra. Announces flood recovery assistance.
2012 January 20 Senators John McCain, Joseph Lieberman, Sheldon Whitehouse, and Kelly Ayotte visit Thailand.
- February 3 Her Royal Highness Princess Maha Chakri Sirindhorn presides over the rededication ceremony of the Royal Sala (Thai pavilion) at U.S. Embassy Bangkok to celebrate the occasion of His Majesty the King’s 7th Cycle Birthday Anniversary.
- July 13 Peace Corps Thailand celebrates 50th anniversary.
- September 27 Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs Kerri-Ann Jones visits the joint Thai/U.S. Armed Forces Research Institute of Medical Science (AFRIMS).
- November 28 USAID and the Thailand International Development Cooperation Agency (“TICA”) sign a Memorandum of Understanding to jointly address development needs in less-developed countries in the region.
- November 15 Secretary of Defense Leon Panetta visits Thailand and meets with Thai Minister of Defense Sukumpol Suwannathat to sign the Joint Vision Statement for the Thai-U.S. Defense Alliance.
- November 18-19 President Barack Obama visits Bangkok and meets with His Majesty King Bhumibol Adulyadej and Prime Minister Yingluck Shinawatra.
2013 March 20 The United States and the Kingdom of Thailand celebrate the 180th anniversary of the March 20, 1833 signing of the Treaty of Amity and Commerce.
- May 6 Secretary of State John Kerry and Thai Deputy Prime Minister/Foreign Minister Surapong Tovichakchaikul meet in Washington, D.C. to discuss the Thai-U.S. relationship and how the two countries can cooperate on issues of regional and global concern. The Secretary and the Foreign Minister discuss increasing Thai-U.S. cooperation in Asia’s multilateral institutions.
- June 1-10 General Prayuth Chan-ocha, Commander in Chief of the Royal Thai Army, visits the United States to discuss military cooperation between the two countries.
- June 19 Secretary Kathleen Sebelius of the Department of Health and Human Services (HHS) visits Thailand and meets with Prime Minister Yingluck Shinawatra at the Government House. They discussed the ongoing Thai-U.S. health partnership and shared challenges in providing healthcare coverage especially to at-risk groups, as well as how to improve the quality of care and cost-effective treatment.
- June 19 Chulabhorn Research Instititute (CRI) President Prof. Dr. HRH Princess Chulabhorn Walailak granted an audience to U.S. Health and Human Services Secretary Kathleen Sebelius. Princess Chulabhorn graciously gave a presentation about the CRI mission and discussed health research collaboration with the United States.
- August 6 Lt. General Stanley Kresge, PACAF Vice Commander presided over the Legion of Merit award ceremony for Air vice-Marshall Surasak Toongtong, Royal Thai Air Force Air Operations Center Chief of Staff and Group Captain Piboon Vorravanpreecha, Royal Thai Air Force Foreign Affairs Division Director. They were awarded the Legion of Merit in recognition of their contributions as Thai Air Attaches to the United States.
- August 6 The United States and Thailand sign a historic agreement on science and technology cooperation that enshrines robust protections for intellectual property while facilitating increased joint research programs, government to government collaboration, and private sector investment and technology transfer.
- August 21 Congressman Ed Royce visits Thailand.
- August 29 Congresswoman Tammy Duckworth visits Thailand and gives a special talk about Thai-U.S. relations and U.S. foreign policy at the Institute of Security and International Studies, Chulalongkorn University.
- September 9 Assistant Secretary of State for International Narcotics and Law Enforcement Affairs (INL) William Brownfield visits the Wildlife Forensic Science Unit at the Department of National Parks, Wildlife and Plant Conservation. There, they observes the scientists at work who were trained under the ARREST (Asia’s Regional Response to Endangered Species Trafficking) Program, funded by USAID Asia and implemented by the FREELAND Foundation.
- September 20 JUSMAGTHAI (Joint US Military Advisory Group Thailand) in Thailand celebrates its 60th anniversary.
- September 20 Great Smoky Mountains National Park establishes its first Sister Park Arrangement with Khao Yai National Park in Thailand.
- September 24 Deputy Secretary of Energy Daniel B. Poneman visits Bangkok and meets with Minister of Science and Technology Phiraphan Phalusuk and Minister of Energy Pongsak Ruktapongpisal at Parliament House.
- December 5 Admiral Samuel J. Locklear, Commander of U.S. Pacific Command, visits Thailand on the occasion of His Majesty the King’s 86th birthday. He also meets with Prime Minister and Defense Minister Yingluck Shinawatra, Supreme Commander General Thanasak Patimaprakorn, and other Thai officials to reaffirm the enduring U.S.-Thai alliance and discuss bilateral security cooperation which benefits both countries and the region.
2014 February 6 Principal Deputy Assistant Secretary of State Scot Marciel visits Bangkok. He meets with environmental NGOs, Thai Ministry of Foreign Affairs Permanent Secretary Sihasak Phuangketkeow, and Thai Deputy Prime Minister Pongthep Thepkanchana, among others.
- April 8-9 Assistant Secretary of State for East Asian and Pacific Affairs Daniel Russel visits Bangkok. He meets with caretaker Prime Minister Yingluck Shinawatra and Democrat Party leader Abhisit Vejjajiva and conveys personal letters from Secretary of State John F. Kerry urging both sides to resolve political issues peacefully and democratically, as a long time friend and ally that wishes to see a strong, stable, and prosperous Thailand.
- May The US Ambassador’s Residence celebrates its 100th anniversary.
- May 23 Dr. Kenneth Bertram, Principal Assistant for Acquisitions, U.S. Army Medical Research and Materiel Command, signs an implementation arrangement that expresses intent to work together with both the Department of Disease Control from the Ministry of Public Health and the Thai Center of Excellence for Life Sciences from the Ministry of Science and Technology to realize our mutual goals in advancing human health in areas such as AIDS research and vaccine discovery.
- June 16 The United States signs Sustainable Fisheries Accord with Southeast Asian Nations including Thailand.
- August 25 Principal Deputy Assistant Secretary of State Scot Marciel discusses emerging security challenges in the Asia-Pacific region at a conference hosted by the Thai Ministry of Foreign Affairs. Mr. Marciel meets with Acting Foreign Minister Sihasak Phuangketkeow, a range of Thai political figures, and members of civil society.
- November 4 Ambassador Kristie A. Kenney transfers official authority for leadership of the U.S. Mission to W. Patrick Murphy, Chargé d’affaires ad interim.
2015 January 26 Assistant Secretary of State for East Asian and Pacific Affairs Daniel Russel visits the Kingdom of Thailand as part of a broader Southeast Asia trip. He gives a special lecture on “U.S. Engagement with the Asia-Pacific Region in 2015” at the Institute of Security and International Studies at Chulalongkorn University, among other engagements.
- April 22 Principal Deputy Assistant Secretary of State for East Asian and Pacific Affairs (PDAS) Scot Marciel visits Bangkok. He discusses the broad range of ongoing U.S.-Thai cooperation, political reform, and democratic development, and U.S.-Thai relations going forward with senior government officials and figures from across the political spectrum.
- May Thailand and the United States join forces to respond to the devastating earthquake in Nepal through the Thai-U.S Humanitarian Assistance Disaster Relief (HADR) Combined Coordination Center at the Royal Thai Navy Airfield in Utapao. In total, 280 U.S. troops supported 172 flight and shuttled 680 US soldiers to and from Nepal, delivering more than 18,000 pounds of Thai-donated relief supplies.
- May 8 The U.S. Centers for Disease Control and Prevention (CDC) and the Thailand Ministry of Public Health celebrate their 35th anniversary of ongoing collaboration.
- May 9 Ambassador Deborah Birx, U.S. Global AIDS Coordinator and Special Representative for Global Health Diplomacy, visits the HIV Vaccine Research Center of Excellence at the Armed Forces Research Institute of Medical Sciences (AFRIMS) in Thailand, a U.S.-Thai partnership to study infectious diseases and develop lifesaving vaccines.
- May 29 Assistant Secretary of State for Population, Refugees, and Migration, Anne C. Richard, leads the U.S. delegation at the Special Meeting on Irregular Migration in the Indian Ocean hosted by the Government of Thailand in Bangkok. She highlights U.S. support for regionally-led efforts to address the challenges of irregular migration in order to save lives and address the root causes of migration, and announces a contribution of US$3 million to the International Organization for Migration in support of the regional response.
- June 4 Thailand and the United States launch the Test, Treat, and Prevent HIV project, a partnership in response to HIV epidemic among men who have sex with men in Thailand.
- June 24 U.S.- ASEAN Ambassador Hachigian visits Bangkok to attend the ICT Solutions to Help Combat Human Trafficking Conference, organized by Microsoft in partnership with USAID and UN agencies. Ambassador Hachigian reaffirms U.S. commitment to fighting human trafficking in the region and beyond.
- September 22 Ambassador Glyn Townsend Davies assumes duty as the U.S. Ambassador to the Kingdom of Thailand.
- December 14-17 Assistant Secretary of State for East Asian and Pacific Affairs Daniel Russel visited the Kingdom of Thailand. He led the U.S. delegation to the 5th U.S.-Thai Strategic Dialogue, the first since 2012. During his visit Assistant Secretary Russel also met with senior Thai government officials, representatives of civil society, and various political party leaders. Among the topics of discussion were the friendship between the United States and Thailand, human rights and democracy, and cooperation on a broad range of issues important to the two countries, the region, and beyond.
2016 January 26 Assistant Secretary of State for Consular Affairs Michele Bond met on with Thai Ministry of Social Development and Human Security officials to commend their work under the Hague Convention on Intercountry Adoptions to process cases for American families adopting Thai children.
- March 7-8 U.S. Department of State and Thai Ministry of Science and Technology convened the first Joint Committee Meeting (JCM) under their Science and Technology Cooperation Agreement, signed in 2013. During the JCM, a senior-level dialogue was co-chaired by Acting Assistant Secretary for Oceans, Environment, and Science Judith Garber and Permanent Secretary of Science and Technology Weerapong Pairsuwan. Both the United States and Thailand committed to deepen bilateral engagements to advance scientific knowledge and technological innovation to address global challenges, including global health, climate change, and environmental issues. They also discussed ways to expand opportunities to collaborate on science, technology, engineering, and mathematics (STEM) education.
- March 25-28 Under Secretary for Civilian Security, Democracy, and Human Rights Sarah Sewall visited the Kingdom of Thailand to engage senior government officials and representatives of civil society on issues of importance to U.S.-Thailand partnership and the region.
- July 26 Her Royal Highness Princess Sirindhorn and a group of military cadets from the Chulachomklao Royal Military Academy (CRMA) attended a special presentation on the U.S. Presidential election process by Fulbright Scholar Dr. Robert Sterken at U.S. Embassy Bangkok.
- October 20-21 Assistant Secretary of Defense for Asian & Pacific Security Affairs, Kelly Magsamen, visited Thailand to express her condolences to the Thai people for their loss of His Majesty King Bhumibol Adulyadej and to reinforce the strong bilateral ties between Thailand and the United States. It was a great honor for her to be invited to the Royal Palace to express her sincere sympathy by signing the official condolence book. She also met with Director General Songsak Saicheua with the Ministry of Foreign Affairs (MFA) and General Chaichan Changmongkol, Permanent Secretary at the Ministry of Defense (MOD).
- October 25-26 Assistant Secretary (A/S) of State for East Asian and Pacific Affairs Daniel R. Russel visited Bangkok on to convey condolences on the passing of His Majesty the King Bhumibol Adulyadej. A/S Russel signed a condolence book at the U.S. Embassy before going to the Grand Palace to pay his respects. He also met with Minister for Foreign Affairs Don Pramudwinai to convey his condolences and to discuss bilateral and regional issues. During his trip, A/S Russel also visited the National Museum and attended a ceremony for King Bhumibol at Wat Bowonniwet, a Royal monastery where His Majesty resided when he was a novice monk.
- November 17-18 Deputy Assistant Secretary of State (DAS) for East Asian and Pacific Affairs W. Patrick Murphy visited Bangkok to convey condolences on the passing of His Majesty the King Bhumibol Adulyade and to discuss areas of enduring U.S.-Thai cooperation. DAS Murphy signed a condolence book at the U.S. Embassy and visited the Grand Palace to pay his respects. He met with senior government officials and representatives of civil society. He also met with members of the U.S.-ASEAN Business Council to discuss the business environment and commercial opportunities in Thailand and the United States.
2017 February 13-14 Admiral Harry B. Harris, Jr., Commander of U.S. Pacific Command visited Thailand to pay his condolences to the Royal family and people of Thailand on the passing of King Bhumibol Adulyadej. He received military honors and joined in an office call with his counterpart, Thailand’s Chief of Defense Forces, General Surapong Suwana-adth, who later joined the Admiral and U.S. Ambassador Glyn Davies for the opening of Cobra Gold 2017. Admiral Harris later met with Prime Minister Prayut Chan-o-cha and Deputy Prime Minister and Minister of Defense Prawit Wongsuwan to discuss the full range of the broad and deep U.S.-Thai security relationship, regional issues, and recent developments in Thailand.
- March 29-April 3 Assistant U.S. Trade Representative (AUSTR) Barbara Weisel led a delegation of USTR and U.S. Department of Commerce officials to Bangkok for a series of meetings focused on expanding U.S. trade in Thailand and the ASEAN region.
- August 1 Peace Corps Thailand celebrates 55th anniversary.
- August 8 Secretary of State Rex Tillerson visited Thailand as guest of the Ministry of Foreign Affairs of the Kingdom of Thailand. The Secretary met with Minister of Foreign Affairs Don Pramudwinai and Prime Minister Prayuth Chan-o-cha to underscore the U.S. commitment to the bilateral relations with Thailand. He signed the book of condolences at the Grand Palace to pay tribute to His Majesty the late King Bhumibol Adulyadej.
- September 27-28 U.S. Secretary of Commerce Wilbur Ross visited Thailand. The Secretary signed the condolence book honoring the late King Bhumibol Adulyadej. He also met with Prime Minister Prayut Chan-o-cha and addressed members of the American Chamber of Commerce. The Secretary’s visit, his first to an ASEAN nation as Secretary of Commerce, aims to deepen economic cooperation between Thailand and the United States.
- October 2 Thai Prime Minister Prayuth Chan-o-cha visited United States. President Trump and Prime Minister Prayuth release a Joint Statement between the United States of America and the Kingdom of Thailand.
- October 26 Secretary of Defense James Mattis led the U.S. Presidential Delegation and extended profound condolences on behalf of the American people as he took part in the Royal Cremation Ceremony for His late Majesty King Bhumibol Adulyadej in Bangkok.
2018 February 6-8 Chairman of the Joint Chiefs of Staff General Joseph F. Dunford, Jr., traveled to Bangkok, Thailand, where he met with his counterpart Royal Thai Armed Forces General Tarnchaiyan Srisuwan, as well as Royal Thai government officials including the Prime Minister and Deputy Prime Minister/Minister of Defense.
- March 20 His Majesty King Maha Vajiralongkorn royally presiding over the grand opening ceremony of the Great and Good Friends exhibition at the Queen Sirikit Museum of Textiles. His Majesty was joined at the royal ceremony by Prime Minister Prayut Chan-o-cha, privy councilors, and members of the Cabinet.
- March 21 The Great and Good Friends exhibition opened to the public from March 21 until June 30, 2018 at the Queen Sirikit Museum of Textiles on the grounds of the Grand Palace. The exhibit displays official gifts exchanged between the United States of America and the Kingdom of Thailand over the past 200 years.
- May 30 U.S. Ambassador Glyn T. Davies offered a donation of 50,000 rabies vaccines to Thailand’s Department of Livestock Development to support Thailand as it addresses an increase in human and animal rabies cases since the beginning of 2018. The donation, made on behalf of the U.S. Government through the U.S. Centers for Disease Control and Prevention (CDC) and the U.S. Agency for International Development (USAID), highlights continued collaboration in public health between the United States and Thailand as the two countries celebrate 200 years of friendship in 2018.
- June 12 Her Royal Highness Princess Maha Chakri Sirindhorn visited Great and Good Friends exhibition at the Queen Sirikit Museum of Textiles. Her Royal Highness royally led a group of Chulajomklao Royal Military cadets to see displays of official gifts exchanged between the United States of America and the Kingdom of Thailand over the past 200 years, in celebration of two centuries of friendship between the two nations.
- June 28 U.S. Ambassador Glyn T. Davies joined Ben King, Country Director of Google Thailand, unveiled the virtual Great and Good Friends exhibition on the Google Arts and Culture platform at https://artsandculture.google.com/project/great-and-good-friends
- July 5 The U.S. State Department’s Bureau of Oceans and International Environmental and Scientific Affairs renewed the United States’ bilateral science and technology agreement with Thailand.
- August 9 Admiral John Aquilino, Commander, Pacific Fleet, visited Thailand and met with U.S. Embassy Chargé d’affaires Peter Haymond, Admiral Sayan Prasongsamret, Deputy Chief of Defense, Royal Thai Armed Forces and several other senior Thai officials. He discussed a broad range of issues underscoring the strong U.S. – Thai relationship and our longstanding security cooperation.
- September 21 JUSMAGTHAI (Joint US Military Advisory Group Thailand) in Thailand celebrates its 65th anniversary.
- September 24S.-Thai Joint Chambers of Commerce signed an MOU establishing the Thailand-U.S. Economic and Business Promotion Committee to foster two-way trade and investment opportunities particularly in the digital economy sphere.
- November 29- 30S. Assistant Secretary of Defense for Asian and Pacific Security Affairs Randall Schriver visited Thailand to co-chair the 5th bilateral Defense Strategic Talks with Thai counterparts at the Ministry of Defense.
2019 February 22 Royal Thai Army and U.S. Special Forces, religious leaders, and guests took part in a dedication ceremony for a Thai – U.S. Special Forces Brotherhood Monument in Lopburi, Thailand. The monument commemorates the long and close bonds, past, present, and future that exist between the Royal Thai Army Special Forces and the U.S. Army Special Forces.
- April 30 Under Secretary for Political Affairs David Hale traveled to Bangkok as part of his first official visit to Asia. He met with National Security Council Secretary-General Wanlop Rugsanaoh and Deputy Foreign Minister Virasakdi Futrakul to discuss how the U.S. and Thailand can work together to ensure a secure and prosperous region.
- May 23 U.S. Assistant Secretary of State for International Narcotics and Law Enforcement Affairs (INL) Kirsten Madison visited Thailand to mark the 20th anniversary of the International Law Enforcement Academy (ILEA) and the opening of newly renovated Academy facility in Bangkok.
- August 1-2 U.S. Secretary of State Michael R. Pompeo visited Thailand and co-chaired the U.S.-Association of Southeast Asian Nations (ASEAN) Ministerial and held a bilateral meeting with Foreign Minister Don Pramudwinai.
- August 14 U.S. Trade and Development Agency (USTDA) announced the reopening of its program in Thailand with the goal of supporting the development of priority infrastructure projects in the energy, transportation, and telecommunications sectors, and helping to foster new commercial partnerships between the United States and Thailand.
- August 23 U.S. Senator Tammy Duckworth visited Thailand. She had an audience with Her Royal Highness Princess Maha Chakri Sirindhorn, spoke with cadets at the Chulachomklao Royal Thai Military Academy, discussed U.S.-Thai relations with Foreign Minister Don Pramudwinai, and met with Prime Minister Prayut Chan-o-cha and other members of parliament.
- September 12 Commanding General of the U.S. Army Pacific General Robert B. Brown and Royal Thai Army Commander General Apirat Kongsompong participated in Stryker-Royal Thai Army Infantry Carrier Vehicles handover ceremony at the Royal Thai Army (RTA) Headquarters in Bangkok.
- September 29 – October 3 Sixth annual #YSEALISummit2019 held in Phuket
- November 4 U.S. National Security Advisor Robert O’Brien visited Thailand and led U.S. delegation at 2019 ASEAN Summit meeting as President’s Special Envoy. He reaffirmed U.S. commitment to central role of ASEAN in the IndoPacific.
- November 4 U.S. Secretary of Commerce Wilbur Ross led a Business Delegation to the Indo-Pacific Business Forum (IPBF) in Bangkok, Thailand. He also met with Thai Government officials, 14 U.S. Chiefs of Mission in Asia, as well as potential partners from Thailand and the region.
- November 17 U.S. Secretary of Defense Dr. Mark Esper visited Thailand to participate in the ASEAN Defense Ministers’ Meeting Plus (ADMM-Plus) to discuss regional defense issues and affirm the U.S. commitment to the U.S.-Thai defense alliance.
- November 17 U.S. Secretary of Defense Mark Esper and Prime Minister Prayut Chan-o-cha, in his capacity as Defense Minister, signed the Joint Vision Statement 2020 for the U.S.-Thai Defense Alliance. Joint Vision 2020 reaffirms the two nations’ shared commitment to their long-standing defense alliance. The signing ceremony was held at Thailand’s Ministry of Defense.
- December 1 The 10th anniversary of RV144—the first clinical trial of HIV vaccine, which was conducted in Thailand.
2020 January 30 Ambassador Michael George DeSombre assumes duty as the U.S. Ambassador to the Kingdom of Thailand.
- January 31 United States Secretary of the Army Ryan McCarthy visited Thailand to meet with senior Thai officials, including Office of the National Security Council Secretary-General Gen. Somsak Roongsita, and Commander in Chief of the Royal Thai Army Gen. Apirat Kongsompong. The Secretary was accompanied by the commander of U.S. Army Pacific, Gen. Paul LaCamera. A strong U.S.-Thai defense alliance, forward-looking and rooted in history, facilitates a free and open Indo-Pacific region where all countries enjoy prosperity and peace.
- February 20 Opening of the U.S.-funded Royal Thai Police Indoor Tactical Training Center in Nong Sarai, Nakhon Ratchasima presided by U.S. Embassy Chargé d’Affaires Michael Heath, Rear Admiral Robert Hayes, Director of Joint Interagency Task Force West (JIATF-W), along with officials from the Royal Thai Police.
Spotlight on Treaty of Amity
Treaty of Amity and Commerce between Siam and the United States
Signed at Sia-Yut’hia (Bangkok), 20th March, 1833
(Ratifications exchanged at Bangkok, 14th April 1836)
His Majesty the Sovereign and Magnificent King in the City of Sia-Yut’hia, has appointed the Chau Phaya-Phraklang, one of the first Ministers of State, to treat with Edmund Roberts, Minister of the United States of America, who has been sent by the Government thereof, on its behalf, to form a treaty of sincere friendship and entire good faith between the two nations. For this purpose the Siamese and the citizens of the United States of America shall, with sincerity, hold commercial intercourse in the Ports of their respective nations as long as heaven and earth shall endure.
This Treaty is concluded on Wednesday, the last of the fourth month of the year 1194, called Pi-marong-chat-tavasok, or the year of the Dragon, corresponding to the 20th day of March, in the year of our Lord 1833. One original is written in Siamese, the other in English; but as the Siamese are ignorant of English, and the Americans of Siamese, a Portuguese and a Chinese translation are annexed, to serve as testimony to the contents of the Treaty. The writing is of the same tenor and date in all the languages aforesaid. It is signed on the one part, with the name of the Chau Phaya-Phraklang, and sealed with the seal of the lotus flower, of glass. On the other part, it is signed with the name of Edmund Roberts, and sealed with a seal containing an eagle and stars.
One copy will be kept in Siam, and another will be taken by Edmund Roberts to the United States. If the Government of the United States shall ratify the said Treaty, and attach the Seal of the Government, then Siam will also ratify it on its part, and attach the Seal of its Government.
There shall be a perpetual Peace between the Magnificent King of Siam and the United States of America.
The Citizens of the United States shall have free liberty to enter all the Ports of the Kingdom of Siam, with their cargoes, of whatever kind the said cargoes may consist; and they shall have liberty to sell the same to any of the subjects of the King, or others who may wish to purchase the same, or to barter the same for any produce or manufacture of the Kingdom, or other articles that may be found there. No prices shall be fixed by the officers of the King on the articles to be sold by the merchants of the United States, or the merchandise they may wish to buy, but the Trade shall be free on both sides to sell, or buy, or exchange, on the terms and for the prices the owners may think fit. Whenever the said citizens of the United States shall be ready to depart, they shall be at liberty so to do, and the proper officers shall furnish them with Passports: Provided always, there be no legal impediment to the contrary. Nothing contained in this Article shall be understood as granting permission to import and sell munitions of war to any person excepting to the King, who, if he does not require, will not be bound to purchase them; neither is permission granted to import opium, which is contraband; or to export rice, which cannot be embarked as an article of commerce. These only are prohibited.
Vessels of the United States entering any Port within His Majesty’s dominions, and selling or purchasing cargoes of merchandise, shall pay in lieu of import and export duties, tonnage, licence to trade, or any other charge whatever, a measurement duty only, as follows: The measurement shall be made from side to side, in the middle of the vessel’s length; and, if a single-decked vessel, on such single deck; if otherwise, on the lower deck. On every vessel selling merchandise, the sum of 1700 Ticals, or Bats, shall be paid for every Siamese fathom in breadth, so measured, the said fathom being computed to contain 78 English or American inches, corresponding to 96 Siamese inches; but if the said vessel should come without merchandise, and purchase a cargo with specie only, she shall then pay the sum of 1,500 ticals, or bats, for each and every fathom before described. Furthermore, neither the aforesaid measurement duty, nor any other charge whatever, shall be paid by any vessel of the United States that enters a Siamese port for the purpose of refitting, or for refreshments, or to inquire the state of the market.
If hereafter the Duties payable by foreign vessels be diminished in favour of any other nation, the same diminution shall be made in favour of the vessels of the United States.
If any vessel of the United States shall suffer shipwreck on any part of the Magnificent King’s dominions, the persons escaping from the wreck shall be taken care of and hospitably entertained at the expense of the King, until they shall find an opportunity to be returned to their country; and the property saved from such wreck shall be carefully preserved and restored to its owners; and the United States will repay all expenses incurred by His Majesty on account of such wreck.
If any citizen of the United States, coming to Siam for the purpose of trade, shall contract debts to any individual of Siam, or if any individual of Siam shall contract debts to any citizen of the United States, the debtor shall be obliged to bring forward and sell all his goods to pay his debts therewith. When the product of such bona fide sale shall not suffice, he shall no longer be liable for the remainder, nor shall the creditor be able to retain him as a slave, imprison, flog, or otherwise punish him, to compel the payment of any balance remaining due, but shall leave him at perfect liberty.
Merchants of the United States coming to trade in the Kingdom of Siam and wishing to rent houses therein, shall rent the King’s Factories, and pay the customary rent of the country. If the said merchants bring their goods on shore, the King’s officers shall take account thereof, but shall not levy any duty thereupon.
If any citizens of the United States, or their vessels, or other property, shall be taken by pirates and brought within the dominions of the Magnificent King, the persons shall be set at liberty, and the property restored to its owners.
Merchants of the United States, trading in the Kingdom of Siam, shall respect and follow the laws and customs of the country in all points.
If thereafter any foreign nation other than the Portuguese shall request and obtain His Majesty’s consent to the appointment of Consuls to reside in Siam, the United States shall be at liberty to appoint Consuls to reside in Siam, equally with such other foreign nation.
Whereas, the undersigned, Edmund Roberts, a citizen of Portsmouth, in the State of New Hampshire, in the United States of America, being duly appointed as Envoy, by Letters Patent, under the Signature of the President and Seal of the United States of America, bearing date at the City of Washington, the 26th day of January, in the year of our Lord 1832, for negotiating and concluding a Treaty of Amity and Commerce between the United States of America and His Majesty, the King of Siam.
Now know ye, that I, Edmund Roberts, Envoy as aforesaid, do conclude the foregoing Treaty of Amity and Commerce, and every Article and Clause therein contained; reserving the same, nevertheless, for the final Ratification of the President of the United States of America, by and with the advice and consent of the Senate of the said United States.
Done at the Royal City of Sia-Yut’hia (commonly called Bangkok), on the 20th day of March, in the year of our Lord 1833, and of the Independence of the United States of America the 57th.
Source: Library of Congress
Click here to view a PDF file of the Treaty of Amity and Commerce of 1833 (PDF 114 KB).
U.S. Ambassadors to Thailand (1882 – Present)
- Michael George DeSombre – State of Residency: Illinois Title: Ambassador Extraordinary and Plenipotentiary Appointment: January 9, 2020 Presentation of Credentials: October 25, 2020 Termination of Mission: Left post January 20, 2021
- Glyn T. Davies – State of Residency: Washington, D.C. Title: Ambassador Extraordinary and Plenipotentiary Appointment: August 5, 2015 Presentation of Credentials: September 22, 2015 Termination of Mission: Left post September 29, 2018
- Kristie A. Kenney – State of Residency: Washington, D.C. Title: Ambassador Extraordinary and Plenipotentiary Appointment: January 10, 2011 Presentation of Credentials: April 27, 2011 Termination of Mission: Left post November 6, 2014.
- Eric G. John – State of Residency: Indiana Title: Ambassador Extraordinary and Plenipotentiary Appointment: May 21, 2007 Presentation of Credentials: January 8, 2008 Termination of Mission: Left post December 4, 2010
- Ralph L. Boyce – State of Residency: Virginia Title: Ambassador Extraordinary and Plenipotentiary Appointment: July 2, 2004 Presentation of Credentials: March 9, 2005 Termination of Mission: Left post December 28, 2007
- Darryl N. Johnson -State of Residency: Washington Title: Ambassador Extraordinary and Plenipotentiary Appointment: November 26, 2001 Presentation of Credentials: March 29, 2002 Termination of Mission: Left post December 28, 2004
- Richard E. Hecklinger – State of Residency: Virginia Title: Ambassador Extraordinary and Plenipotentiary Appointment: December 1, 1998 Presentation of Credentials: March 9, 1999 Termination of Mission: Left post December 21, 2001
- William H. Itoh – State of Residency: New Mexico Title: Ambassador Extraordinary and Plenipotentiary Appointment: Dec 19, 1995 Presentation of Credentials: February 20, 1996 Termination of Mission: Left post February 1, 1999
- David Floyd Lambertson – State of Residency: Kansas Title: Ambassador Extraordinary and Plenipotentiary Appointment: July 22, 1991 Presentation of Credentials: September 24, 1991 Termination of Mission: Left post August 25, 1995
- Daniel Anthony O’Donohue – State of Residency: Virginia Title: Ambassador Extraordinary and Plenipotentiary Appointment: Jul 11, 1988 Presentation of Credentials: August 13, 1988 Termination of Mission: Left post August 10, 1991
- William Andreas Brown – State of Residency: New Hampshire Title: Ambassador Extraordinary and Plenipotentiary Appointment: June 6, 1985 Presentation of Credentials: July 5, 1985 Termination of Mission: Left post August 5, 1988
- John Gunther Dean – State of Residency: New York Title: Ambassador Extraordinary and Plenipotentiary Appointment: October 1, 1981 Presentation of Credentials: October 26, 1981 Termination of Mission: Left post June 6, 1985
- Morton I. Abramowitz – State of Residency: Massachusetts Title: Ambassador Extraordinary and Plenipotentiary Appointment: June 27, 1978 Presentation of Credentials: August 9, 1978 Termination of Mission: Left post July 31, 1981
- Charles S. Whitehouse – State of Residency: Virginia Title: Ambassador Extraordinary and Plenipotentiary Appointment: May 8, 1975 Presentation of Credentials: May 30, 1975 Termination of Mission: Left post June 19, 1978
- William R. Kintner – State of Residency: Pennsylvania Title: Ambassador Extraordinary and Plenipotentiary Appointment: September 28, 1973 Presentation of Credentials: November 29, 1973 Termination of Mission: Left post March 15, 1975
- Leonard Unger – State of Residency: Maryland Title: Ambassador Extraordinary and Plenipotentiary Appointment: August 11, 1967 Presentation of Credentials: October 4, 1967 Termination of Mission: Left post November 19, 1973
- Graham A. Martin – State of Residency: Florida Title: Ambassador Extraordinary and Plenipotentiary Appointment: September 10, 1963 Presentation of Credentials: November 7, 1963 Termination of Mission: Left post September 9, 1967
- Kenneth Todd Young – State of Residency: New York Title: Ambassador Extraordinary and Plenipotentiary Appointment: March 29, 1961 Presentation of Credentials: June 22, 1961 Termination of Mission: Left post August 19, 1963
- U. Alexis Johnson – State of Residency: California Title: Ambassador Extraordinary and Plenipotentiary Appointment: January 30, 1958 Presentation of Credentials: February 14, 1958 Termination of Mission: Left post April 10, 1961
- Max Waldo Bishop – State of Residency: Arkansas Title: Ambassador Extraordinary and Plenipotentiary Appointment: December 3, 1955 Presentation of Credentials: January 9, 1956 Termination of Mission: Left post January 6, 1958 Note: Commissioned during a recess of the Senate; recommissioned after confirmation on January 18, 1956.
- John E. Peurifoy – State of Residency: South Carolina Title: Ambassador Extraordinary and Plenipotentiary Appointment: September 15, 1954 Presentation of Credentials: December 3, 1954 Termination of Mission: Died near Hua Hin, August 12, 1955 Note: Commissioned during a recess of the Senate; recommissioned after confirmation on December 3, 1954.
- William J. Donovan – State of Residency: New York Title: Ambassador Extraordinary and Plenipotentiary Appointment: August 3, 1953 Presentation of Credentials: September 4, 1953 Termination of Mission: Left post August 21, 1954.
- Edwin F. Stanton – State of Residency: California Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: April 27, 1946 Presentation of Credentials: July 4, 1946 Termination of Mission: Promoted to Ambassador Extraordinary and Plenipotentiary Note: Commissioned to Siam.
- Charles W. Yost – State of Residency: New York Title: Charg้ d’Affaires Appointment: [see note] Presentation of Credentials: January 5, 1946 Termination of Mission: Superseded, July 4, 1946 Note: Not commissioned; letter of credence sent to Yost by telegram, October 16, 1945.
- Willys R. Peck – State of Residency: California Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: August 19, 1941 Presentation of Credentials: September 16, 1941 Termination of Mission: Japanese forces occupied Bangkok, December 8, 1941 Note: Thailand declared war on the United States January 25, 1942. Peck, having been interned, left post June 29, 1942.
- Hugh Gladney Grant – State of Residency: Alabama Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: April 3, 1940 Presentation of Credentials: August 20, 1940 Termination of Mission: Left post August 30, 1941
- Edwin L. Neville – State of Residency: Ohio Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: May 28, 1937 Presentation of Credentials: October 2, 1937 Termination of Mission: Left post May 1, 1940 Note: Commissioned to Siam.
- James Marion Baker – State of Residency: South Carolina Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: August 30, 1933 Presentation of Credentials: December 9, 1933 Termination of Mission: Left post May 2, 1936 Note: Commissioned during a recess of the Senate; recommissioned after confirmation on January 15, 1934. Commissioned to Siam.
- David E. Kaufman – State of Residency: Pennsylvania Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: June 12, 1930 Presentation of Credentials: December 9, 1930 Termination of Mission: Left post June 15, 1933 Note: Commissioned to Siam.
- Harold Orville MacKenzie – State of Residency: New Jersey Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: March 3, 1927 Presentation of Credentials: June 28, 1927 Termination of Mission: Left post March 29, 1930 Note: Commissioned to Siam.
- William E. Russell – State of Residency: District of Columbia Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: September 28, 1925 Presentation of Credentials: [January 9, 1926] Termination of Mission: Left post January 7, 1927 Note: Commissioned during a recess of the Senate; recommissioned after confirmation on December 17, 1925. Commissioned to Siam. Officially received on January 9, 1926.
- Edward E. Brodie – State of Residency: Oregon Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: October 8, 1921 Presentation of Credentials: January 31, 1922 Termination of Mission: Left post May 2, 1925 Note: Commissioned to Siam.
- George W. P. Hunt – State of Residency: Arizona Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: May 18, 1920 Presentation of Credentials: September 6, 1920 Termination of Mission: Left post October 1, 1921 Note: Commissioned to Siam.
- George Pratt Ingersoll – State of Residency: Connecticut Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: August 8, 1917 Presentation of Credentials: November 24, 1917 Termination of Mission: Left post June 23, 1918 Note: Commissioned to Siam.
- William H. Hornibrook – State of Residency: Oregon Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: February 12, 1915 Presentation of Credentials: May 31, 1915 Termination of Mission: Presented recall, October 24, 1916 Note: Commissioned to Siam.
- Fred W. Carpenter – State of Residency: California Title: Envoy Extraordinary and Minister Plenipotentiary Appointment: September 12, 1912 Presentation of Credentials: January 22, 1913 Termination of Mission: Left post November 16, 1913 Note: Commissioned during a recess of the Senate; recommissioned after confirmation on March 1, 1913. Commissioned to Siam.
- Hamilton King – State of Residency: Michigan Title: Minister Resident/Consul General Appointment: January 14, 1898 Presentation of Credentials: April 26, 1898 Termination of Mission: Promoted to Envoy Extraordinary and Minister Plenipotentiary Note: Commissioned to Siam.
- John Barrett – State of Residency: Oregon Title: Minister Resident/Consul General Appointment: February 14, 1894 Presentation of Credentials: November 15, 1894 Termination of Mission: Presented recall, April 26, 1898 Note: Commissioned to Siam.
- Sempronius H. Boyd – State of Residency: Missouri Title: Minister Resident/Consul General Appointment: October 1, 1890 Presentation of Credentials: January 17, 1891 Termination of Mission: Relinquished charge, June 13, 1892 Note: Commissioned to Siam.
- Jacob T. Child – State of Residency: Missouri Title: Minister Resident/Consul General Appointment: March 9, 1886 Presentation of Credentials: June 5, 1886 Termination of Mission: Presented recall, January 17, 1891 Note: Commissioned to Siam.
Official State Visits Over the Years
Interested in information about official states visits by American and Thai Heads of State and Heads of Government through the years? Visit the links below for more. (Available in English only.)