| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Fort Gadsden | city | Florida | United States | 29.92 | -84.98 | 16 | |
| Fort Gage | city | Illinois | United States | 37.96 | -89.90 | 360 | |
| Fort Gaines | city | Alabama | United States | 30.25 | -88.07 | 0 | |
| Fort Gaines | city | Georgia | United States | 31.61 | -85.05 | 255 | |
| Fort Garland | city | Colorado | United States | 37.43 | -105.43 | 7893 | |
| Fort Gass (historical) | city | Ohio | United States | 39.22 | -84.79 | 830 | |
| Fort Gates | city | Florida | United States | 29.42 | -81.66 | 3 | |
| Fort Gates | city | Texas | United States | 31.40 | -97.71 | 830 | |
| Fort Gay | city | West Virginia | United States | 38.12 | -82.60 | 830 | |
| Fort George | city | Maine | United States | 44.39 | -68.81 | 98 | |
| Fort George G Mead Junction | city | Maryland | United States | 39.13 | -76.79 | 147 | |
| Fort George Island | city | Florida | United States | 30.40 | -81.43 | 3 | |
| Fort Gibson | city | Oklahoma | United States | 35.80 | -95.25 | 830 | |
| Fort Gibson (historical) | city | Indiana | United States | 38.28 | -87.51 | 830 | |
| Fort Goff | city | California | United States | 41.86 | -123.26 | 2001 | |
| Fort Gordon | city | Georgia | United States | 33.42 | -82.16 | 830 | |
| Fort Gorges | city | Maine | United States | 43.66 | -70.22 | 0 | |
| Fort Grand | city | West Virginia | United States | 39.58 | -80.09 | 1023 | |
| Fort Green | city | Florida | United States | 27.61 | -81.94 | 108 | |
| Fort Green Springs | city | Florida | United States | 27.59 | -81.94 | 121 | |
| Fort Greene | city | New York | United States | 40.69 | -73.97 | 65 | |
| Fort Griffin | city | Texas | United States | 32.93 | -99.23 | 1253 |