List of ambassadors of the United States to the United Kingdom

Ambassador of the United States of America to the Court of St James's
Seal of the United States Department of State
Flag of the United States Ambassador
Incumbent Jane D. Hartley since July 19, 2022
U.S. Department of State Embassy of the United States, London
Style	His or Her Excellency (formal) Mr. or Madam Ambassador (informal)
Reports to	United States Secretary of State
Residence	Winfield House
Seat	London, United Kingdom
Appointer	President of the United States with the advice and consent of the Senate
Term length	At the pleasure of the President
Inaugural holder	John Adams (as Minister Plenipotentiary to the Court of St. James's)
Formation	1785
Website	U.S. Embassy – London

The United States ambassador to the United Kingdom (known formally as, The Ambassador of the United States of America to the Court of St James's)^[1] is the official representative of the president of the United States and the American government to the monarch (Court of St. James's) and government of the United Kingdom.^[2] The position is held by Jane D. Hartley, who presented her credentials to Queen Elizabeth II on July 19, 2022.^[3]

The position is regarded as one of the most prestigious posts in the United States Foreign Service due to the "special relationship" between the United States and the United Kingdom.^[4] The ambassadorship has been held by various notable politicians, including five who would later become president: John Adams, James Monroe, John Quincy Adams, Martin Van Buren and James Buchanan. However, the modern tendency of American presidents (of both parties) is to appoint keen political fundraisers from previous presidential campaigns, despite the importance and prestige of the office.^[5]

The ambassador and executive staff work at the American Embassy in Nine Elms, London. The official residence of the ambassador is Winfield House in Regent's Park.^[1]