Fort Morris, Georgia, known as Fort Defiance during the War of 1812

"Fort Defiance", briefly the name of the Presidio de la Bahia in Goliad, Texas during the Texas Revolution

Fort Defiance, Arizona, an unincorporated community

Fort Defiance State Park near Estherville, Iowa

Fort Defiance (plantation), in North Carolina, former home of William Lenoir (general)

Fort Defiance (British Columbia), winter quarters for American Captain Robert Gray

Fort Defiance (Ohio), in present-day Defiance, Ohio

Fort Defiance, Virginia, an unincorporated community

Fort Defiance (Illinois), a Civil War post commanded by General Ulysses S. Grant, site of Fort Defiance Park

Fort Defiance (Wisconsin), a fort during the Black Hawk War