| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Opata | city | Sonora | Mexico | 28.13 | -109.66 | 830 | 1041 |
| Opatla | city | Veracruz | Mexico | 19.06 | -96.91 | 3730 | 17138 |
| Opatla Viejo | city | Veracruz | Mexico | 19.08 | -96.91 | 3559 | 15544 |
| Opchen | city | Yucatan | Mexico | 21.10 | -88.68 | 68 | 635 |
| Opedepe | city | Sonora | Mexico | 29.93 | -110.63 | 2509 | 152 |
| Opichan Norte | city | Tamaulipas | Mexico | 22.76 | -98.20 | 164 | 303 |
| Opichen | city | Yucatan | Mexico | 20.95 | -89.68 | 36 | 107704 |
| Opichen | city | Yucatan | Mexico | 20.55 | -89.86 | 150 | 2224 |
| Opichen | city | Yucatan | Mexico | 21.10 | -88.68 | 68 | 635 |
| Opichén | city | Yucatan | Mexico | 21.30 | -88.80 | 9 | 1533 |
| Opil | city | Yucatan | Mexico | 21.07 | -89.07 | 39 | 3848 |
| Opochi | city | Sinaloa | Mexico | 25.82 | -108.20 | 262 | 2243 |
| Opodepe | city | Sonora | Mexico | 29.93 | -110.63 | 2509 | 152 |
| Opola | city | Yucatan | Mexico | 20.52 | -89.31 | 72 | 3721 |
| Opomea | city | Sinaloa | Mexico | 26.03 | -108.24 | 830 | 2086 |
| Oponguio | city | Michoacan de Ocampo | Mexico | 19.60 | -101.67 | 6824 | 6159 |
| Oponguio | city | Michoacan de Ocampo | Mexico | 19.65 | -101.65 | 6824 | 4332 |
| Opopeo | city | Michoacan de Ocampo | Mexico | 19.41 | -101.61 | 7549 | 16893 |
| Oposura | city | Sonora | Mexico | 29.00 | -111.66 | 144 | 894 |
| Oposura | city | Sonora | Mexico | 29.01 | -111.68 | 131 | 894 |
| Opotal | city | Sonora | Mexico | 29.17 | -109.66 | 1085 | 30 |
| Opotes | city | Sonora | Mexico | 28.35 | -109.95 | 1003 | 149 |
| Opotes | city | Sonora | Mexico | 28.32 | -109.87 | 830 | 149 |
| Opotzinga | city | Veracruz | Mexico | 18.55 | -97.01 | 7076 | 16230 |
| Oputo | city | Sonora | Mexico | 30.15 | -109.32 | 2070 | 197 |
| Oputo | city | Sonora | Mexico | 30.05 | -109.33 | 2509 | 149 |
| Opština Ameca | city | Jalisco | Mexico | 20.55 | -104.05 | 4189 | 30088 |
| Opština Apodaca | city | Nuevo Leon | Mexico | 25.76 | -100.16 | 1669 | 321562 |
| Opština El Marqués | city | Guerrero | Mexico | 16.78 | -99.83 | 0 | 35381 |
| Opština Encarnación de Díaz | city | Jalisco | Mexico | 21.53 | -102.24 | 5931 | 24058 |
| Opština Heroica Ciudad de Juchitán de Zaragoza | city | Oaxaca | Mexico | 16.44 | -95.02 | 85 | 22771 |
| Opština Ixtlán del Río | city | Nayarit | Mexico | 21.04 | -104.37 | 3546 | 14492 |
| Opština Jonotla | city | Puebla | Mexico | 20.03 | -97.58 | 2805 | 17469 |
| Opština Nuevo Laredo | city | Tamaulipas | Mexico | 27.48 | -99.52 | 830 | 135030 |
| Opština Santa Cruz de Juventino Rosas | city | Guanajuato | Mexico | 20.64 | -100.99 | 5869 | 36170 |
| Opština Tala | city | Jalisco | Mexico | 20.65 | -103.70 | 4432 | 40714 |
| Opština Tequila | city | Jalisco | Mexico | 20.88 | -103.84 | 4189 | 20644 |
| Opština Tlacolula de Matamoros | city | Oaxaca | Mexico | 16.95 | -96.48 | 5328 | 17115 |
| Opština Tonalá | city | Jalisco | Mexico | 20.62 | -103.23 | 5232 | 163373 |
| Opština Ures | city | Sonora | Mexico | 29.43 | -110.39 | 1669 | 298 |
| Opština Uruapan | city | Michoacan de Ocampo | Mexico | 19.41 | -102.06 | 5308 | 132087 |
| Opština Villa de Zaachila | city | Oaxaca | Mexico | 16.95 | -96.75 | 5029 | 34419 |