Embassy of the United States, London

The first American Embassy in London was situated in Great Cumberland Place, later moving to Piccadilly, Portland Place and Grosvenor Gardens. In 1938, the embassy was moved to 1 Grosvenor Square (which now hosts part of the Canadian High Commission). During this time, Grosvenor Square began to accommodate many U.S. government offices, including the headquarters of General Dwight D. Eisenhower and the European headquarters of the United States Navy. Following World War II, the Duke of Westminster donated land for a memorial to wartime President Franklin D. Roosevelt.

The American Embassy London Chancery Building was constructed in the late 1950s, opening in 1960. It was designed by Finnish American modernist architect Eero Saarinen. The building has nine stories, three of which are below ground. A large gilded aluminum Bald Eagle by Theodore Roszak, with a wingspan of over 11 metres (35 feet) is situated on the roof of the Chancery Building, making it a recognizable London landmark. In October 2009, the building was granted Grade II listed status.

This embassy, as with many U.S. embassies in the world, is situated on land that is not owned by the U.S. government. The land is leased from the Duke of Westminster who, when asked if he would sell the land outright, responded that he would if the U.S. Government would return the land that belonged to his family in the U.S. before it was confiscated during the Revolutionary War. The Duke refused to grant a freehold because, from the Duke's perspective, the U.S. Government had stolen some of his ancestor's estates in Virginia.