The Department of Defence (U.S. spelling Department of Defense) is a department within the governments of a number of countries. It may refer to:

• Department of Defence (Australia)
• Department of National Defence and the Canadian Forces
• Department of Defence (Ireland)
• Department of National Defense (Philippines)
• South African Department of Defence
• United States Department of Defense

See also:

• Ministry of Defence (disambiguation page)

bn:?????????? ???? no:Forsvarsdepartement