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

• CCGS John G. Diefenbaker, a planned Canadian Coast Guard icebreaker

This disambiguation page lists articles associated with the title Diefenbaker.
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