This is a list of historical forts in the United States. World War II military reservations containing 8-inch and larger gun batteries are also included.

Alabama

Alaska

Arizona

Fort Apache, open to the public
Fort Bowie, open to the public
Fort Buchanan
Fort Crittenden
Fort Defiance
Fort Grant, closed to the public
Fort Huachuca, closed to the public
Fort Lowell, open to the public
Fort Mojave
Fort Tyson
Fort Verde, open to the public
Fort Whipple, open to the public

Arkansas

Fort Carlos III, destroyed by erosion
Fort Chaffee, closed to the public
Fort Curtis, open to the public
Fort Logan H. Roots, open to the public
Fort Lookout, open to the public
Fort Smith, open to the public

California

For a more comprehensive list, see List of forts in California.

Colorado

For a more comprehensive list, see List of forts in Colorado.

Connecticut

Fort Griswold, open to the public
Fort Nathan Hale, open to the public
Fort Trumbull, open to the public
Fort Stamford, open to the public

Delaware

Fort Casimir, destroyed
Fort Christina, open to the public
Fort Delaware, open to the public
Fort du Pont, open to the public
Fort Miles, open to the public
Fort Saulsbury, closed to the public

Florida

For a more comprehensive list, see List of forts in Florida.

Georgia

Fort Eisenhower, closed to the public
Fort Frederica, open to the public
Fort Gillem
Fort Hawkins, open to the public
Fort James Jackson, open to the public
Fort King George, open to the public
Fort McAllister, open to the public
Fort McPherson
Fort Moore, closed to the public
Fort Pulaski, open to the public
Fort Scott
Fort Stewart, closed to the public

Hawaii

Fort Armstrong
Fort DeRussy, closed to the public
Fort Hase, closed to the public
Fort Kamehameha
Fort Elizabeth, open to the public
Fort Ruger, open to the public
Schofield Barracks, closed to the public
Fort Shafter, closed to the public

Idaho

Fort Boise
Camp Connor
Fort Hall, open to the public
Fort Lapwai, open to the public
Fort Sherman, open to the public

Illinois

Indiana

Fort Benjamin Harrison, open to the public
Fort Patrick Henry, abandoned
Fort Knox, abandoned
Fort Wayne, open to the public
Fort Ouiatenon, destroyed during the Northwest Indian War

Iowa

Fort Atkinson, open to the public

Kansas

Kentucky

Fort Boonesborough, open to the public
Fort Campbell, closed to the public
Fort Harrod, open to the public
Fort Knox, closed to the public
Fort Nelson
Fort William

Louisiana

Maine

Fort Baldwin, open to the public
Fort Edgecomb, open to the public
Fort Foster, open to the public
Fort George, open to the public
Fort Gorges, open to the public
Fort Halifax, open to the public
Fort Kent, open to the public
Fort Knox, open to the public
Fort Levett, closed to the public
Fort Lyon, closed to the public
Fort McClary, open to the public
Fort McKinley, closed to the public
Fort O'Brien, open to the public
Fort Pentagouet
Fort Popham, open to the public
Fort Preble, open to the public
Fort Scammel, closed to the public
Fort Sullivan, open to the public
Fort Sumner, open to the public
Fort Williams, open to the public
Fort William Henry, open to the public

Maryland

Fort Armistead, open to the public
Fort Carroll, closed to the public
Fort Cumberland, demolished
Fort Defiance, open to the public
Fort Detrick, closed to the public
Fort Foote, open to the public
Fort Frederick, open to the public
Fort George G. Meade, closed to the public
Fort Howard, open to the public
Fort McHenry, open to the public
Fort Severn, demolished
Fort Smallwood, open to the public
Fort Washington, open to the public

Massachusetts

Michigan

Main article: List of military installations in Michigan

Fort de Buade
Fort Detroit
Fort Holmes
Fort Mackinac
Fort Miami
Fort Michilimackinac
Fort St. Joseph (Niles)
Fort St. Joseph (Port Huron), rebuilt as Fort Gratiot
Fort Wayne (Detroit)
Fort Wilkins

Minnesota

Mississippi

Missouri

Fort Belle Fontaine, open to the public
Fort Cap au Gris
Fort Crowder
Fort Leonard Wood, closed to the public
Fort Osage, open to the public
Jefferson Barracks, open to the public

Montana

Nebraska

Nevada

Fort Churchill, open to the public

New Hampshire

New Jersey

New Mexico

New York

North Carolina

Fort Anderson, open to the public
Fort Caswell, closed to the public
Fort Dobbs, open to the public
Fort Fisher, open to the public
Fort Greene
Fort Hampton, open to the public
Fort Johnston, open to the public
Fort Liberty, closed to the public
Fort Macon, open to the public

North Dakota

Ohio

Oklahoma

Oregon

Pennsylvania

Fort Allen (Carbon County, Pennsylvania), abandoned
Fort Allen (Westmoreland County, Pennsylvania), abandoned
Fort Armstrong, abandoned
Fort Augusta, destroyed
Fort Bedford, partially reconstructed, open to the public
Fort Bigham, destroyed
Fort Depuy, abandoned
Fort Deshler, abandoned
Fort Duquesne, destroyed
Fort Granville, destroyed
Fort Halifax, destroyed
Fort Henry, abandoned
Fort Hunter, abandoned
Fort Hyndshaw, abandoned
Fort Jones, destroyed
Fort Juniata Crossing, abandoned
Fort Laughlin, destroyed
Fort Lebanon, abandoned
Fort Le Boeuf, destroyed
Light's Fort, under renovation
Fort Ligonier, reconstructed, open to the public
Fort Loudoun, reconstructed, open to the public
Fort Lyttleton, destroyed
Fort Machault, destroyed
Fort Manada, destroyed
Fort Martin, abandoned
Fort Manada, abandoned
Fort McCord, destroyed
Fort McIntosh, destroyed
Mercer's Fort, destroyed
Fort Mifflin, open to the public
Fort Necessity, destroyed
Fort Northkill, abandoned
Fort Pitt, partially reconstructed, open to the public
Fort Presque Isle, destroyed
Fort Prince George, destroyed
Fort Robert Smalls, destroyed
Fort Roberdeau, reconstructed, open to the public
Fort Robinson, abandoned
Fort Shirley, abandoned
Fort Swatara, abandoned
Fort Venango, destroyed
Heinrich Zeller House, open to the public

Puerto Rico

Rhode Island

Fort Adams, open to the public
Fort Barton, open to the public
Fort Burnside, open to the public
Fort Church
Fort Dumpling, open to the public
Fort Getty, open to the public
Fort Greble
Fort Greene (1794), abandoned
Fort Greene (1943)
Fort Hamilton
Fort Kearny, open to the public
Fort Mansfield, open to the public
Fort Ninigret, open to the public
Queen's Fort, open to the public
Fort Varnum
Fort Wetherill, open to the public
Fort Wolcott, destroyed

South Carolina

Fort Sumter

South Dakota

Main article: List of forts in South Dakota

Fort Bennett
Fort James, abandoned
Fort Meade, abandoned
Fort Randall, open to the public
Fort Sisseton, open to the public
Fort Sully, abandoned

Tennessee

Main article: List of forts in Tennessee

Texas

Main article: Forts of Texas

Utah

Vermont

For a more comprehensive list, see List of forts in Vermont.

Brattleboro Barracks
Champlain Arsenal
Chimney Point
Fort Dummer
Fort Ethan Allen
Fort Frederick
Fort Independence, located on Mount Independence
Fort Mott
Fort Ranger
Fort Sainte Anne
Fort Warren

Virginia

Virgin Islands (U.S.)

Washington

Fort Canby
Fort Casey, open to the public
Fort Columbia, open to the public
Fort Colville
Fort Dent
Fort Ebey
Fort Flagler
Fort George Wright
Camp Hayden, open to the public
Fort Lawton
Fort Lewis
Fort Nez Percés
Fort Nisqually, rebuilt as a living history museum
Fort Okanogan
Fort Simcoe, open to the public
Fort Spokane
Fort Steilacoom, open to the public
Fort Townsend
Fort Vancouver, open to the public
Fort Walla Walla, open to the public
Fort Ward, open to the public
Fort Whitman
Fort Worden, open to the public