Olive Freeman Palmer Diefenbaker (1902 - 1976) was the second wife of John George Diefenbaker, the 13th Prime Minister of Canada. (John Diefenbaker's first wife, Edna Brower Diefenbaker, passed away in 1950.)

John and Olive Diefenbaker married in 1952. They had one child: a daughter from her previous marriage.

See also: Spouses of the Prime Ministers of Canada