London Transport was the body responsible for London's public transport from 1933 to 2000. It has responsibility for Buses including Green Line Coaches, Trams & Underground, and retained formal control of the tube until 2003. Its successor is Transport for London.

It was founded in 1933 as the London Passenger Transport Board by an act of Parliament under Transport Minister Herbert Morrison, and covered the "London Passenger Transport Area", (an area within a radius of 30 miles from Charing Cross, extending from Baldock in the north, to Brentwood in the east, Horsham in the south and High Wycombe in the west), and far outside the current boundaries of Greater London.

It was nationalised in 1948 becoming the London Transport Executive.

Most of its functions were transferred to Transport for London in 2000 when the Mayor of London and the London Assembly were established.

The London Underground was transferred to TfL in 2003 when the public-private partnership was completed.