West Yorkshire, metropolitan county of northern England, comprising five metropolitan boroughs: Calderdale, Kirklees, and the city of Bradford in the west and the cities of Leeds and Wakefield in the east.From 1974 to 1986 West Yorkshire was an administrative unit. In 1986 the metropolitan county lost its administrative powers, and its constituent boroughs became autonomous administrative units, or unitary authorities.West Yorkshire is now a geographic and ceremonial county without administrative authority.