| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| O'Brien | city | Texas | United States | 33.38 | -99.84 | 1669 | |
| O'Canas Family Colonia | city | Texas | United States | 26.22 | -97.83 | 49 | |
| O'Donnell | city | Texas | United States | 32.96 | -101.83 | 3349 | |
| O'Donnell Place | city | Texas | United States | 28.45 | -97.33 | 131 | |
| O'Farrell | city | Texas | United States | 33.12 | -94.32 | 380 | |
| O'Farrell Acres Number 1 Colonia | city | Texas | United States | 28.02 | -97.49 | 52 | |
| O'Farrell Acres Number 2 Colonia | city | Texas | United States | 28.03 | -97.56 | 52 | |
| O'Quinn | city | Texas | United States | 29.82 | -96.97 | 406 |