Westminster-Dewdney was a provincial electoral district in the Canadian province of British Columbia from 1894 to 1900. It and its sister ridings Westminster-Delta, Westminster-Chilliwhack and Westminster-Richmond were successors to the old four-member Westminster riding, which appeared in 1890 only and was a subdivision of the older New Westminster riding. Westminster-Dewdney was succeeded by the Dewdney riding in the election of 1903. This area is currently part of the Maple Ridge-Mission riding, with its former eastern portions now in Chilliwack-Kent (Dewdney had included Agassiz and Harrison Hot Springs in its first incarnation).