| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Fort Jackson | city | Louisiana | United States | 29.36 | -89.46 | 13 | |
| Fort Jackson | city | New York | United States | 44.71 | -74.71 | 830 | |
| Fort Jacques | city | Lwes | Haiti | 18.47 | -72.27 | 3625 | 273997 |
| Fort James | city | British Columbia | Canada | 54.43 | -124.25 | 2509 | 2301 |
| Fort Jameson | city | Eastern | Zambia | -13.63 | 32.65 | 4189 | 68456 |
| Fort Jefferson | city | Florida | United States | 24.63 | -82.87 | 0 | |
| Fort Jefferson | city | Ohio | United States | 40.03 | -84.66 | 1095 | |
| Fort Jennings | city | Ohio | United States | 40.91 | -84.30 | 830 | |
| Fort Jesup | city | Louisiana | United States | 31.61 | -93.40 | 347 | |
| Fort Jesus | city | Nairobi City | Kenya | -1.31 | 36.78 | 5869 | 627957 |
| Fort Jeudy | city | Saint George | Grenada | 12.00 | -61.70 | 0 | 17390 |
| Fort Johnson | city | New York | United States | 42.96 | -74.23 | 298 | |
| Fort Johnson | city | Utah | United States | 37.78 | -113.03 | 5869 | |
| Fort Johnson Estates | city | South Carolina | United States | 32.74 | -79.91 | 3 | |
| Fort Johnston | city | Mangochi | Malawi | -14.46 | 35.26 | 1669 | 52526 |
| Fort Jones | city | California | United States | 41.61 | -122.84 | 3349 | |
| Fort Jones | city | California | United States | 38.26 | -120.42 | 3349 | |
| Fort Julesburg (historical) | city | Colorado | United States | 40.94 | -102.36 | 3536 |