Fort Frederick
- Fort Frederica National Monument
- Fort Frederick (Albany)
- Fort Frederick (Kingston, Ontario)
- Fort Frederick (Maine)
- Fort Frederick (Newfoundland)
- Fort Frederick (Saint John, New Brunswick)
- Fort Frederick (Vermont)
- Fort Frederick Heritage Preserve
- Fort Frederick State Park
- Fort Frederick, Eastern Cape
- Fort Frederick, South Carolina
- Fort Frederick, U.S. Virgin Islands
- Fort Frederik
- Fort Fredrick