| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Fort Ogden | city | Florida | United States | 27.09 | -81.95 | 22 | |
| Fort Oglethorpe | city | Georgia | United States | 34.95 | -85.26 | 830 | |
| Fort Ogé | city | Sides | Haiti | 18.25 | -72.43 | 830 | 0 |
| Fort Opus | city | Dubrovacko-Neretvanska Zupanija | Croatia | 43.02 | 17.57 | 22 | 12228 |
| Fort Ord Village (historical) | city | California | United States | 36.62 | -121.83 | 141 |