West Yorkshire is a metropolitan county within the Yorkshire and the Humber region of England with a population of 2.2 million. West Yorkshire came into existence as a metropolitan county in 1974 after the passage of the Local Government Act 1972.

West Yorkshire, which is landlocked, consists of five metropolitan boroughs (City of Bradford, Calderdale, Kirklees, City of Leeds and City of Wakefield) and shares borders with the counties of Derbyshire (to the south), Greater Manchester (to the south-west), Lancashire (to the north-west), North Yorkshire (to the north and east) and South Yorkshire (to the south-east).

West Yorkshire County Council was abolished in 1986, and so its districts (the metropolitan boroughs) are now effectively unitary authorities. However, the metropolitan county, which covers an area of 2,029 square kilometres (783 sq mi), continues to exist in law, and as a geographic frame of reference. Since 1 April 2014 West Yorkshire has been a combined authority area, with the local authorities pooling together some functions over transport and regeneration as the West Yorkshire Combined Authority.