Agrément/designated | Diplomatic accreditation | Ambassador | Thai name | Observations | List of prime ministers of Thailand | List of presidents of the United States | Term end |
November 1, 1893 | | Phra Suriya Nuvatr | พระสุริยานุรัตน์ | Chargé d'affaires After the Paknam incident he was sent from London to Washington, D.C. to search for Arbitration in the Franco-Siamese crisis, Listed as SIAM,[2] | Chulalongkorn | Grover Cleveland | |
April 1, 1894 | | | | Legation replaced | Chulalongkorn | Grover Cleveland | June 1, 1894 |
June 2, 1894 | | Marquis de Maha Yotha | | Envoy Extraordinary and Minister Plenipotentiary | Chulalongkorn | Grover Cleveland | |
August 1, 1895 | | | | Legation replaced | Chulalongkorn | Grover Cleveland | December 1, 1898 |
November 12, 1898 | | Visuddha Suriyasakti | | In 1903 he was Thai Ambassador to the United Kingdom, 1903: M. Phya Visuddha Suriyasakti, Son Envoyé extraordinaire et Ministre plénipotentiaire à la Haye et à Londres. Phya means Marquis | Chulalongkorn | William McKinley | |
December 1, 1899 | April 16, 1900 | Phya Prasiddhi | | with residence in London. Thai Ambassador to the United Kingdom | Chulalongkorn | William McKinley | |
December 13, 1901 | | Akharaj Varadhara | | Phya =Marquis de | Chulalongkorn | Theodore Roosevelt | |
May 22, 1912 | | Prince Traidos Prabandh | | | Vajiravudh | William Howard Taft | |
December 8, 1913 | | Phya Prabha Karavongse | | [3] | Vajiravudh | Woodrow Wilson | |
May 26, 1921 | May 26, 1921 | Sanpakitch Preencha [es] | พระยาสรรพกิจปรีชา | Chargé d'affaires[4] | Vajiravudh | Warren G. Harding | |
April 27, 1923 | | Phya Buri Navarasth | พญาบุรีนวรัฐ | (Died February 7, 1926) | Vajiravudh | Calvin Coolidge | |
February 8, 1926 | | Pra Sundara Vachana | | Chargé d'affaires | Prajadhipok | Calvin Coolidge | |
October 15, 1926 | | Phya Vijitavongs | พลโทพญาวิจัชวงศ์ | Lt. Gen. | Prajadhipok | Calvin Coolidge | |
May 29, 1929 | | Prince Amoradat Kridakara | พลเอกเจ้าอาวาสรามาธิบดี | Maj. Gen. | Prajadhipok | Herbert C. Hoover | |
January 5, 1932 | | Phya Subarn Sompati | | | Phraya Manopakorn Nititada | Herbert C. Hoover | |
April 11, 1933 | | Prince Pridi Debyabongs Devakula | พลตรี หม่อมเจ้าปรีดิเทพย์พงศ์ เทวกุล | From 1930 to 1931 he was Thai Ambassador to Germany | Phraya Phahon Phonphayuhasena | Franklin D. Roosevelt | |
August 15, 1935 | August 21, 1935 | Phya Abhibal Rajamaitri | | (* March 7, 1885 in Bangkok) Son of Chao Phya Surawongs and Yai Bunnag. - 1901–1904 studied at Malvern College, England.
- 1909 Bachelor of Laws, King's College, Cambridge, England.
- 1910 Barrister-at-law, Inner Temple, London, England.
- 1915 Teru. Barrister-at-law, Siam.
- From 1930 to 1932 he was Thai Ambassador to Italy, Envoy Extraordinary anu Minister Plenipotentiary of Siam to Rome.
- From 1 September 1933 – 22 September 1934 he was State councillor of Siam for foreign affairs, while Tom Bunnag was Foreign minister.
- In 1935 he became Envoy Extraordinary anu Minister Plenipotentiary of Siam to Washington, D.C.
- From 1933 to 1935 he was Member Assembly of People's Representatives.
- From July 8, 1948, to May 15, 1958, he was Thai Ambassador to China.[citation needed]
| Phraya Phahon Phonphayuhasena | Franklin D. Roosevelt | June 24, 1940 |
August 1, 1939 | | | | Listed as THAILAND | Phibul Songkhram | Franklin D. Roosevelt | |
June 18, 1940 | June 24, 1940 | Seni Pramoj | th:หม่อมราชวงศ์เสนีย์ ปราโมช | October 1945Listed as SIAM | Phibul Songkhram | Franklin D. Roosevelt | |
January 16, 1949 | | Thanat Khoman | | Chargé d'affaires[5] | Phibul Songkhram | Harry S. Truman | |
March 26, 1947 | | | | Legation raised to Embassy, Effective date of elevation of Mission was date of President's approval of agreement. | Kuang Abhayawongse | Harry S. Truman | |
April 14, 1947 | April 18, 1947 | Wan Waithayakon | th:พระเจ้าวรวงศ์เธอ พระองค์เจ้าวรรณไวทยากร กรมหมื่นนราธิปพงศ์ประพันธ์ | | Kuang Abhayawongse | Harry S. Truman | |
November 8, 1947 | | | | relations served after the Siamese coup d'état of 1947[6] | Kuang Abhayawongse | Harry S. Truman | March 6, 1948 |
June 5, 1952 | June 12, 1952 | Pote Sarasin | th:พจน์ สารสิน | | Phibul Songkhram | Harry S. Truman | |
September 10, 1947 | October 14, 1957 | Thanat Khoman | th:ถนัด คอมันตร์ | | Kuang Abhayawongse | Harry S. Truman | |
May 12, 1959 | June 1, 1959 | Visutr Arthayukti | | | Sarit Dhanarajata | Dwight D. Eisenhower | |
October 29, 1963 | December 19, 1963 | Sukich Nimmanheminda | | | Thanom Kittikachorn | Lyndon B. Johnson | |
December 20, 1967 | January 19, 1968 | Bunchana Atthakor | | | Thanom Kittikachorn | Lyndon B. Johnson | |
September 16, 1969 | October 10, 1969 | Sunthorn Hongladarom [de] | th:สุนทร หงส์ลดารมภ์ | | Thanom Kittikachorn | Richard Nixon | |
September 13, 1972 | October 2, 1972 | Anand Panyarachun | th:อานันท์ ปันยารชุน | | Thanom Kittikachorn | Richard Nixon | |
January 19, 1976 | February 9, 1976 | Upadit Pachariyangkun [fr] | th:อุปดิศร์ ปาจรียางกูร | | Seni Pramoj | Gerald Ford | |
October 22, 1976 | | Sukho Suwansiri | | Chargé d'affaires | Seni Pramoj | Gerald Ford | |
April 26, 1977 | May 13, 1977 | Arun Panupong | อรุณ ภาณุพงศ์ | | Kriangsak Chomanan | Jimmy Carter | |
January 17, 1978 | | Sukho Suwansiri | | Chargé d'affaires | Kriangsak Chomanan | Jimmy Carter | |
July 24, 1978 | August 2, 1978 | Klos Visessurakarn | | | Kriangsak Chomanan | Jimmy Carter | |
June 26, 1980 | August 22, 1980 | Prok Amaranand | | | Prem Tinsulanonda | Jimmy Carter | |
November 9, 1982 | November 22, 1982 | Kasem S. Kasemsri [de] | th:หม่อมราชวงศ์เกษมสโมสร เกษมศรี | Kasemsamosorn Kasemsri | Prem Tinsulanonda | Ronald Reagan | |
September 30, 1985 | November 24, 1985 | Arsa Sarasin | th:อาสา สารสิน | | Prem Tinsulanonda | Ronald Reagan | |
April 13, 1988 | July 5, 1988 | Vitthya Vejjajiva | | | Chatichai Choonhavan | Ronald Reagan | |
May 23, 1991 | June 11, 1991 | Birabhongse Kasemsri | th:หม่อมหลวงพีระพงศ์ เกษมศรี | | Anand Panyarachun | George H. W. Bush | |
June 23, 1994 | | Manaspas Xuto | มนัสพาสน์ ชูโต | | Suchinda Kraprayoon | Bill Clinton | |
January 25, 1996 | February 6, 1996 | Nitya Pibulsonggram | th:นิตย์ พิบูลสงคราม | | Chavalit Yongchaiyudh | Bill Clinton | |
April 7, 2000 | June 14, 2000 | Tej Bunnag | th:เตซ บุนนาค | | Chuan Leekpai | Bill Clinton | |
November 27, 2001 | December 12, 2001 | Sakthip Krairiksh | ศักดิ์ทิพย์ ไกรฤกษ์ | | Thaksin Shinawatra | George W. Bush | |
July 12, 2004 | July 15, 2004 | Kasit Piromya | th:กษิต ภิรมย์ | | Thaksin Shinawatra | George W. Bush | |
February 10, 2006 | March 13, 2006 | Virasakdi Futrakul | th:วีระศักดิ์ ฟูตระกูล | | Surayud Chulanont | George W. Bush | |
April 26, 2007 | July 25, 2007 | Krit Garnjana Goonchorn | th:กฤษณ์ กาญจนกุญชร | | Surayud Chulanont | George W. Bush | |
July 17, 2009 | July 20, 2009 | Don Pramudwinai | th:ดอน ปรมัตถ์วินัย | | Samak Sundaravej | Barack Obama | |
December 6, 2010 | December 7, 2010 | Kittiphong Na Ranong | th:กิตติพงษ์ ณ ระนอง | | Samak Sundaravej | Barack Obama | |
April 18, 2012 | May 2, 2012 | Chaiyong Satjipanon | th:ชัยยงค์ สัจจิพานนท์ | | Yingluck Shinawatra | Barack Obama | |
October 25, 2013 | December 3, 2013 | Vijavat Isarabhakdi | th:วิชาวัฒน์ อิศรภักดี | | Yingluck Shinawatra | Barack Obama | May 7, 2014 |
February 18, 2015 | February 23, 2015 | Pisan Manawapat | พิศาล มาณวพัฒน์ | | Prayut Chan-o-cha | Barack Obama | August 22, 2023 |
June 2018 | | Virachai Plasai | th:วีรชัย พลาศรัย | Died March 16, 2019 | Prayut Chan-o-cha | Donald Trump | March 16, 2019 |
August 2019 | | Thani Thongphakdi | ธานี ทองภักดี | | Prayut Chan-o-cha | Donald Trump | September 2020 |
2021 | | Manasvi Srisodapol | มนัสวี ศรีโสดาพล | | Prayut Chan-o-cha | Joe Biden | September 2022 |
November 2022 | December 12, 2022 | Tanee Sangrat | ธานี แสงรัตน์ | | Prayut Chan-o-cha Srettha Tavisin | Joe Biden | |