| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Old Amelia Mobile Home Park | city | Florida | United States | 30.63 | -81.46 | 13 | |
| Old Bay View | city | Florida | United States | 30.44 | -86.11 | 45 | |
| Old Bayshore Point | city | Florida | United States | 27.87 | -82.49 | 3 | |
| Old Bridge Village Mobile Home Park | city | Florida | United States | 26.68 | -81.86 | 0 | |
| Old Callaway | city | Florida | United States | 30.14 | -85.57 | 9 | |
| Old Duette | city | Florida | United States | 27.54 | -82.10 | 111 | |
| Old Fashioned Acres | city | Florida | United States | 28.06 | -82.21 | 82 | |
| Old Fernandina | city | Florida | United States | 30.69 | -81.45 | 9 | |
| Old Fort Trailer Park | city | Florida | United States | 28.04 | -80.58 | 3 | |
| Old Grove | city | Florida | United States | 25.96 | -81.61 | 3 | |
| Old Henley Place | city | Florida | United States | 28.40 | -82.14 | 68 | |
| Old Hickery | city | Florida | United States | 28.09 | -82.12 | 98 | |
| Old Hillsborough Estates | city | Florida | United States | 28.00 | -82.27 | 52 | |
| Old Marco Junction | city | Florida | United States | 26.02 | -81.70 | 3 | |
| Old Myakka | city | Florida | United States | 27.31 | -82.27 | 32 | |
| Old Town | city | Florida | United States | 29.60 | -82.98 | 19 | |
| Oldsmar | city | Florida | United States | 28.03 | -82.67 | 6 | |
| Oldsmar Farm | city | Florida | United States | 28.03 | -82.62 | 9 | |
| Olga | city | Florida | United States | 26.72 | -81.71 | 9 | |
| Olin's Mobile Home Park | city | Florida | United States | 29.99 | -82.13 | 147 | |
| Olive | city | Florida | United States | 30.51 | -87.26 | 124 | |
| Oliver Acres | city | Florida | United States | 27.96 | -82.10 | 108 | |
| Olustee | city | Florida | United States | 30.20 | -82.43 | 144 | |
| Olympia Heights | city | Florida | United States | 25.73 | -80.36 | 6 | |
| Olympus Acres | city | Florida | United States | 27.89 | -82.22 | 68 |