Diefenbaker (disambiguation)

John Diefenbaker (1895–1979) was the 13th prime minister of Canada, serving as such from 1957 to 1963.

Diefenbaker may also refer to the following namesakes of the prime minister:
 * Diefenbaker the wolf, an animal character in the television series Due South
 * Lake Diefenbaker, a Canadian lake
 * Saskatoon John G. Diefenbaker International Airport, a Canadian airport