The Austin Westminster series are large saloon and estate cars that were sold by the British manufacturer Austin from 1954, replacing the A70 Hereford. The Westminster line was produced as the A90, A95, A99, A105, and A110 until 1968 when the new Austin 3-Litre took its place. Essentially badge-engineered versions of the Farina Westminsters were also produced using the premium Wolseley and Vanden Plas marques. 101,634 Westminsters were built.

The Austin Motor Company Limited was an English manufacturer of motor vehicles, founded in 1905 by Herbert Austin in Longbridge. In 1952 it was merged with Morris Motors Limited in the new holding company British Motor Corporation (BMC) Limited, keeping its separate identity. The marque Austin was used until 1987 by BMC's successors British Leyland and Rover Group. The trademark is currently owned by the Chinese firm SAIC Motor, after being transferred from bankrupt subsidiary Nanjing Automotive which had acquired it with MG Rover Group in July 2005.