| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ola | city | Texas | United States | 32.58 | -96.18 | 830 | |
| Olcott | city | Texas | United States | 29.59 | -95.17 | 26 | |
| Old Airport Road Colonia | city | Texas | United States | 28.43 | -97.77 | 272 | |
| Old Beekley Place | city | Texas | United States | 30.23 | -103.22 | 4189 | |
| Old Boston | city | Texas | United States | 33.40 | -94.42 | 324 | |
| Old Brazoria | city | Texas | United States | 29.06 | -95.57 | 22 | |
| Old Burk Place | city | Texas | United States | 31.40 | -101.05 | 2509 | |
| Old Caseyville Crossing | city | Texas | United States | 33.01 | -98.61 | 1049 | |
| Old Center | city | Texas | United States | 32.01 | -94.19 | 298 | |
| Old Center | city | Texas | United States | 32.01 | -94.19 | 298 | |
| Old Christian Place | city | Texas | United States | 31.54 | -104.28 | 4189 | |
| Old Corbett Place | city | Texas | United States | 30.03 | -103.04 | 3595 | |
| Old Davy | city | Texas | United States | 29.08 | -97.63 | 396 | |
| Old Diana | city | Texas | United States | 32.74 | -94.74 | 403 | |
| Old Dime Box | city | Texas | United States | 30.38 | -96.86 | 360 | |
| Old Edith Lochausen Place | city | Texas | United States | 30.12 | -103.09 | 4189 | |
| Old Elwood | city | Texas | United States | 31.07 | -95.80 | 252 | |
| Old Farm Crossing | city | Texas | United States | 35.52 | -102.60 | 3349 | |
| Old Flatonia | city | Texas | United States | 29.66 | -97.09 | 830 | |
| Old Freitag Place | city | Texas | United States | 31.46 | -101.09 | 2509 | |
| Old Glory | city | Texas | United States | 33.13 | -100.06 | 1669 | |
| Old House Place | city | Texas | United States | 31.22 | -103.98 | 3421 | |
| Old Houston Highway Colonia | city | Texas | United States | 28.42 | -97.72 | 203 | |
| Old Houston Place | city | Texas | United States | 32.02 | -101.70 | 2598 | |
| Old Ingleside Colonia | city | Texas | United States | 27.84 | -97.22 | 26 | |
| Old London | city | Texas | United States | 32.23 | -94.94 | 830 | |
| Old Milwaukee East Colonia | city | Texas | United States | 27.49 | -99.42 | 830 | |
| Old Milwaukee West Colonia | city | Texas | United States | 27.49 | -99.43 | 830 | |
| Old Moulton | city | Texas | United States | 29.59 | -97.18 | 830 | |
| Old Ocean | city | Texas | United States | 29.08 | -95.75 | 32 | |
| Old Oscar Nance Place | city | Texas | United States | 30.48 | -103.19 | 5029 | |
| Old Parker Place | city | Texas | United States | 30.49 | -103.21 | 4297 | |
| Old Patterson Place | city | Texas | United States | 31.04 | -105.34 | 4189 | |
| Old Place Windmill | city | Texas | United States | 30.91 | -103.84 | 3517 | |
| Old Place Windmills | city | Texas | United States | 32.17 | -102.53 | 3349 | |
| Old Rebel Field Colonia | city | Texas | United States | 26.17 | -97.88 | 55 | |
| Old Rebel Heights Colonia Number 1 | city | Texas | United States | 26.19 | -97.88 | 55 | |
| Old Rebel Heights Colonia Number 2 | city | Texas | United States | 26.19 | -97.88 | 55 | |
| Old Reed Place | city | Texas | United States | 30.08 | -103.13 | 4189 | |
| Old River Community | city | Texas | United States | 29.89 | -94.81 | 26 | |
| Old River Terrace | city | Texas | United States | 29.78 | -95.13 | 22 | |
| Old River-Winfree | city | Texas | United States | 29.87 | -94.83 | 32 | |
| Old Round Rock (historical) | city | Texas | United States | 30.51 | -97.68 | 830 | |
| Old Saint Marys | city | Texas | United States | 28.10 | -97.21 | 0 | |
| Old Salem | city | Texas | United States | 33.45 | -94.53 | 360 | |
| Old Santa Elena | city | Texas | United States | 26.72 | -98.48 | 301 | |
| Old Tascosa (historical) | city | Texas | United States | 35.53 | -102.26 | 3349 | |
| Old Union | city | Texas | United States | 32.93 | -97.13 | 830 | |
| Old Union | city | Texas | United States | 33.19 | -94.91 | 396 | |
| Old Union | city | Texas | United States | 31.41 | -96.42 | 830 | |
| Old Union | city | Texas | United States | 33.34 | -94.47 | 314 | |
| Old Waverly | city | Texas | United States | 30.53 | -95.35 | 406 | |
| Olde Oaks | city | Texas | United States | 30.01 | -95.49 | 114 | |
| Olden | city | Texas | United States | 32.42 | -98.75 | 1669 | |
| Oldenburg | city | Texas | United States | 29.98 | -96.76 | 830 | |
| Oldham | city | Texas | United States | 31.40 | -95.48 | 387 | |
| Oldham | city | Texas | United States | 32.87 | -96.88 | 830 | |
| Oldham | city | Texas | United States | 30.74 | -94.23 | 203 | |
| Oletha | city | Texas | United States | 31.36 | -96.41 | 830 | |
| Olfen | city | Texas | United States | 31.61 | -99.96 | 1692 | |
| Olin | city | Texas | United States | 31.88 | -98.11 | 1669 | |
| Olivarez | city | Texas | United States | 26.23 | -97.99 | 65 | |
| Olivarez Colonia | city | Texas | United States | 26.39 | -98.84 | 213 | |
| Olivarez Number 1 Colonia | city | Texas | United States | 26.19 | -97.98 | 68 | |
| Olivarez Number 10 Colonia | city | Texas | United States | 26.22 | -97.97 | 62 | |
| Olivarez Number 15 Colonia | city | Texas | United States | 26.23 | -98.00 | 68 | |
| Olivarez Number 17 Colonia | city | Texas | United States | 26.23 | -97.99 | 62 | |
| Olivarez Number 18 Colonia | city | Texas | United States | 26.26 | -97.97 | 59 | |
| Olivarez Number 2 Colonia | city | Texas | United States | 26.21 | -97.99 | 62 | |
| Olivarez Number 3 Colonia | city | Texas | United States | 26.21 | -97.99 | 62 | |
| Olivarez Number 4 Colonia | city | Texas | United States | 26.23 | -97.96 | 59 | |
| Olivarez Number 5 Colonia | city | Texas | United States | 26.15 | -97.98 | 68 | |
| Olivarez Number 6 Colonia | city | Texas | United States | 26.22 | -97.99 | 62 | |
| Olivarez Number 7 Colonia | city | Texas | United States | 26.26 | -97.98 | 59 | |
| Olivarez Number 8 Colonia | city | Texas | United States | 26.26 | -97.99 | 65 | |
| Olivarez Number 9 Colonia | city | Texas | United States | 26.26 | -97.98 | 59 | |
| Olivia | city | Texas | United States | 28.64 | -96.46 | 0 | |
| Olivia Lopez de Gutierrez Colonia | city | Texas | United States | 26.33 | -98.72 | 170 | |
| Ollie | city | Texas | United States | 30.79 | -94.78 | 328 | |
| Olmito | city | Texas | United States | 26.02 | -97.53 | 29 | |
| Olmito and Olmito Number 2 Colonia | city | Texas | United States | 26.34 | -98.64 | 252 | |
| Olmos | city | Texas | United States | 26.36 | -98.78 | 157 | |
| Olmos | city | Texas | United States | 29.44 | -98.03 | 830 | |
| Olmos | city | Texas | United States | 28.24 | -97.82 | 249 | |
| Olmos Park | city | Texas | United States | 29.48 | -98.49 | 830 | |
| Olney | city | Texas | United States | 33.37 | -98.75 | 1177 | |
| Olton | city | Texas | United States | 34.18 | -102.13 | 3618 | |
| Olympic Colonia | city | Texas | United States | 26.18 | -97.90 | 55 |