Embassy of the United States, London

The Embassy of the United States of America in London is the diplomatic mission of the United States in the United Kingdom. Its office is located in Nine Elms and is the largest American embassy in Western Europe and the focal point for events relating to the United States held in the United Kingdom.

The embassy building in Nine Elms overlooks the River Thames and has been open to the public since 13 December 2017; it was formally opened on 16 January 2018.

John Adams was the first minister to open an American legation in London, in 1785 at 9 Grosvenor Square, Westminster, London. For much of the 20th century and into the 21st, the chancery was in a purpose-built building in Grosvenor Square.

Since 1955, Winfield House in Regent's Park has served as the ambassador's official residence.