Northumberland Avenue is a street in the City of Westminster in central London that runs from Trafalgar Square in the west to the Thames Embankment in the east. The road was built on the site of Northumberland House, the London home of the Percy family, the Dukes of Northumberland.
Several British government ministry departments are located in buildings on Northumberland Avenue; the Ministry of Defence and the Air Ministry formerly occupied the triangular-shaped Metropole Hotel on the street. Other buildings include the Nigerian high commission and a London School of Economics halls of residence (opposite The Sherlock Holmes pub). Northumberland Avenue has a square on the Monopoly board named after it.