West Yorkshire is a metropolitan county within the Yorkshire and the Humber region of England, that has a population of 2.1 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 km², continues to exist in law, and as a geographic frame of reference.

North Yorkshire is a non-metropolitan or shire county, located in the Yorkshire and the Humber region of England, and a ceremonial county in that region and also partly in North East England. Created in 1974 by the Local Government Act 1972 it covers an area of 8,654 km², making it the largest county in England.
The area under the control of the county council, or shire county, is divided into a number of local government districts; they are Craven, Hambleton, Harrogate, Richmondshire, Ryedale, Scarborough and Selby.

York, Middlesbrough and Redcar and Cleveland are unitary authority boroughs which form part of the ceremonial county for various functions such as the Lord Lieutenant of North Yorkshire, but do not come under county council control. Uniquely for a district in England, Stockton-on-Tees is split between North Yorkshire and County Durham for this purpose. Middlesbrough, Stockton-on-Tees and Redcar and Cleveland boroughs form part of the North East England region.

South Yorkshire is a metropolitan county in the Yorkshire and the Humber region of England. It has a population of 1.29 million. It consists of four metropolitan boroughs: Barnsley, Doncaster, Rotherham, and the city of Sheffield. South Yorkshire was created on 1 April 1974 as a result of the Local Government Act 1972.
The principal settlements of South Yorkshire are: Sheffield, an industrial city whose economy is historically based on steel production and cutlery manufacturing. Today it is known for its sports facilities, culture and tourist industry. Doncaster, an old Roman town known for railways and horse racing; Rotherham, an industrial town bordering Sheffield on the River Don; Barnsley, a market town on the River Dearne, the former administrative centre of the metropolitan county.