During your stay in London, you may need the services of the US Embassy - for example, if you lose your passport. The US Embassy in London is currently in a large imposing building in Mayfair, central London.
The US Ambassador in London is known officially as The Ambassador to the Court of St. James's. He is the personal representative of the US President and oversees the Embassy, as well as Consulates General in Edinburgh (Scotland) and Belfast (Northern Ireland) and a liaison office in Cardiff (Wales).
Representatives from the State Department and 26 other US government agencies manage portfolios concerning economic, commercial and agricultural affairs, consular and immigration issues, customs, transportation, and law enforcement activities, as well as political and military relations, and public affairs.
Register Your Trip
US travelers are encouraged to register their trips abroad online.
How To Contact the US Embassy in London
The US Embassy in London operating hours are Monday to Friday, 8:30 am to 5 pm but some Sections and Agencies within the Embassy may differ. All offices are closed on Saturday, Sunday, and American and British Holidays.
U.S. Embassy, London
24 Grosvenor Square
Nearest Tube Station: Marble Arch
020 7499 9000
This is the number for emergencies too as a Consular Duty Officer is available 24 hours.
The US Embassy in London is moving to Nine Elms, near Vauxhall, in late 2016. The site was purchased in 2008. The building design was opened up to competition to ensure the new facility reflects the best of modern design, incorporates the latest in energy-efficient building techniques, and celebrates the values of freedom and democracy.
The project, due for completion late 2016, has been funded entirely by the proceeds of the sale of other U.S. Government properties in London, not through appropriated funds.
US Embassy in London - Visa and Passport Information
Do note, The Consulate is not open for walk-in visa inquiries. You need to make an appointment and should hear back without 5 days of your request. More information on the official website.
Appointments for a visitor or other temporary visas can be scheduled online at:
You may also schedule an appointment by phone:
Callers Within the United Kingdom:
Please dial: 020 3608 6998
Callers From the United States:
Please dial: 170 3543 9334
Important Information When Visiting the US Embassy in London
Please do not take mobile phones or any electronic devices, such as cellphones, iPods, or PDAs as they are not allowed within the Embassy. You are also strongly advised to not bring large bags, such as backpacks, suitcases or packages. Liquids of any kind either in bottles, cartons or cups will not be allowed in the building. Visitors who do not follow these instructions will experience considerable delays at the security checkpoint which could result in them being asked to return to the Embassy on another day.
Passport and Citizenship Unit
Do note, there is no walk-in service for United States citizens who require a service related to passports, citizenship or birth registration. These services are by appointment only.
All of the latest information from the Passport & Citizenship Unit of the US Embassy in London is on the official website.