| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oachaka | city | Oaxaca | Mexico | 17.07 | -96.72 | 5180 | 248079 |
| Oahaka | city | Oaxaca | Mexico | 17.07 | -96.72 | 5180 | 248079 |
| Oaxaca | city | Oaxaca | Mexico | 17.07 | -96.72 | 5180 | 248079 |
| Oaxaca | city | Oaxaca | Mexico | 16.34 | -95.93 | 3349 | 495 |
| Oaxaca City | city | Oaxaca | Mexico | 17.07 | -96.72 | 5180 | 248079 |
| Oaxaca by | city | Oaxaca | Mexico | 17.07 | -96.72 | 5180 | 248079 |
| Oaxaca de Juárez | city | Oaxaca | Mexico | 17.07 | -96.72 | 5180 | 248079 |
| Oaxaka de Juárez | city | Oaxaca | Mexico | 17.07 | -96.72 | 5180 | 248079 |
| Obispo | city | Oaxaca | Mexico | 18.10 | -95.93 | 75 | 18880 |
| Obscuro | city | Oaxaca | Mexico | 16.53 | -97.36 | 3349 | 1388 |
| Ocopetlatzingo | city | Oaxaca | Mexico | 18.19 | -96.91 | 5029 | 13013 |
| Ocotal | city | Oaxaca | Mexico | 16.78 | -95.17 | 1243 | 3419 |
| Ocotal | city | Oaxaca | Mexico | 16.63 | -94.67 | 830 | 1506 |
| Ocotal | city | Oaxaca | Mexico | 16.63 | -94.65 | 347 | 1356 |
| Ocotal | city | Oaxaca | Mexico | 16.12 | -96.15 | 5413 | 1432 |
| Ocotal | city | Oaxaca | Mexico | 16.95 | -95.13 | 1669 | 3637 |
| Ocotal | city | Oaxaca | Mexico | 16.77 | -95.50 | 3723 | 1043 |
| Ocotal | city | Oaxaca | Mexico | 16.89 | -95.48 | 1702 | 1043 |
| Ocotal Grande | city | Oaxaca | Mexico | 16.85 | -94.97 | 830 | 8077 |
| Ocote | city | Oaxaca | Mexico | 16.93 | -95.03 | 830 | 13590 |
| Ocote | city | Oaxaca | Mexico | 16.37 | -96.42 | 5351 | 3649 |
| Ocote | city | Oaxaca | Mexico | 16.35 | -96.57 | 5269 | 14203 |
| Ocote Largo | city | Oaxaca | Mexico | 16.23 | -96.98 | 7549 | 1043 |
| Ocotepec | city | Oaxaca | Mexico | 16.96 | -95.85 | 6233 | 2687 |
| Ocotepec | city | Oaxaca | Mexico | 16.80 | -96.39 | 5869 | 7217 |
| Ocotepec | city | Oaxaca | Mexico | 17.14 | -97.76 | 7053 | 8985 |
| Ocotes | city | Oaxaca | Mexico | 15.93 | -96.73 | 3710 | 3842 |
| Ocotlan | city | Oaxaca | Mexico | 17.70 | -97.20 | 7601 | 1858 |
| Ocotlan | city | Oaxaca | Mexico | 16.65 | -98.17 | 2509 | 7305 |
| Ocotlan | city | Oaxaca | Mexico | 16.71 | -96.71 | 5029 | 12926 |
| Ocotlan | city | Oaxaca | Mexico | 16.65 | -98.20 | 2509 | 9767 |
| Ocotlán | city | Oaxaca | Mexico | 16.81 | -96.71 | 5029 | 31800 |
| Ocotlán | city | Oaxaca | Mexico | 16.75 | -96.68 | 5029 | 20432 |
| Ocotlán | city | Oaxaca | Mexico | 16.79 | -96.67 | 5029 | 28020 |
| Ocotlán | city | Oaxaca | Mexico | 16.76 | -96.72 | 5029 | 23965 |
| Ocotlán de Juárez | city | Oaxaca | Mexico | 16.37 | -97.68 | 2831 | 2235 |
| Ocotlán de Morelos | city | Oaxaca | Mexico | 16.79 | -96.67 | 5029 | 28020 |
| Ocu | city | Oaxaca | Mexico | 17.71 | -95.31 | 137 | 1302 |
| Ojamanes | city | Oaxaca | Mexico | 16.34 | -94.23 | 242 | 4190 |
| Ojitlán | city | Oaxaca | Mexico | 18.06 | -96.40 | 324 | 4375 |
| Ojo Venado | city | Oaxaca | Mexico | 15.99 | -96.28 | 2709 | 2845 |
| Ojo de Agua | city | Oaxaca | Mexico | 16.43 | -97.06 | 4189 | 1194 |
| Ojo de Agua | city | Oaxaca | Mexico | 16.23 | -97.72 | 328 | 2183 |
| Ojo de Agua | city | Oaxaca | Mexico | 16.28 | -94.26 | 213 | 1781 |
| Ojo de Agua | city | Oaxaca | Mexico | 15.96 | -97.39 | 95 | 3209 |
| Ojo de Agua | city | Oaxaca | Mexico | 17.15 | -97.05 | 7549 | 3131 |
| Ojo de Agua | city | Oaxaca | Mexico | 17.12 | -97.22 | 7057 | 969 |
| Ojo de Agua | city | Oaxaca | Mexico | 17.23 | -97.65 | 7037 | 8427 |
| Ojo de Agua | city | Oaxaca | Mexico | 17.51 | -97.89 | 7053 | 3909 |
| Ojo de Agua | city | Oaxaca | Mexico | 17.75 | -97.77 | 5869 | 13698 |
| Ojo de Agua | city | Oaxaca | Mexico | 17.23 | -97.98 | 6709 | 5513 |
| Ojo de Agua | city | Oaxaca | Mexico | 17.14 | -97.71 | 9514 | 5350 |
| Ojo de Agua | city | Oaxaca | Mexico | 15.85 | -96.41 | 2509 | 7834 |
| Ojo de Agua | city | Oaxaca | Mexico | 17.37 | -96.93 | 6745 | 2806 |
| Ojo de Agua | city | Oaxaca | Mexico | 15.88 | -96.24 | 1814 | 5248 |
| Ojo de Agua | city | Oaxaca | Mexico | 16.58 | -94.87 | 305 | 9785 |
| Ojo de Agua | city | Oaxaca | Mexico | 16.80 | -97.27 | 7873 | 494 |
| Ojo de Agua | city | Oaxaca | Mexico | 16.54 | -95.20 | 830 | 3955 |
| Ojo de Agua | city | Oaxaca | Mexico | 17.99 | -96.08 | 173 | 6307 |
| Ojo de Agua | city | Oaxaca | Mexico | 16.29 | -97.84 | 1669 | 11099 |
| Ojo de Agua | city | Oaxaca | Mexico | 16.53 | -97.16 | 5124 | 2631 |
| Ojo de Agua Arena | city | Oaxaca | Mexico | 17.33 | -97.86 | 6194 | 3755 |
| Ojo de Agua Sosola | city | Oaxaca | Mexico | 17.28 | -97.04 | 6709 | 2656 |
| Ojo de Caballo | city | Oaxaca | Mexico | 16.18 | -95.84 | 2624 | 586 |
| Ojo de Pato | city | Oaxaca | Mexico | 16.33 | -94.75 | 91 | 4725 |
| Ojo de Venado | city | Oaxaca | Mexico | 15.99 | -96.26 | 2509 | 2673 |
| Ojoche | city | Oaxaca | Mexico | 17.84 | -96.30 | 928 | 5615 |
| Ojomanes | city | Oaxaca | Mexico | 16.34 | -94.23 | 242 | 4190 |
| Olagueche | city | Oaxaca | Mexico | 16.43 | -96.38 | 5029 | 2995 |
| Olintepec | city | Oaxaca | Mexico | 16.50 | -97.62 | 3349 | 2821 |
| Olleras de Bustamante | city | Oaxaca | Mexico | 18.22 | -97.55 | 7549 | 1277 |
| Olotepec | city | Oaxaca | Mexico | 16.25 | -95.15 | 141 | 20749 |
| Olvido | city | Oaxaca | Mexico | 16.02 | -96.37 | 4399 | 3498 |
| Ometepec | city | Oaxaca | Mexico | 16.18 | -97.97 | 65 | 4465 |
| Opština Heroica Ciudad de Juchitán de Zaragoza | city | Oaxaca | Mexico | 16.44 | -95.02 | 85 | 22771 |
| Opština Tlacolula de Matamoros | city | Oaxaca | Mexico | 16.95 | -96.48 | 5328 | 17115 |
| Opština Villa de Zaachila | city | Oaxaca | Mexico | 16.95 | -96.75 | 5029 | 34419 |
| Oreja de Leon | city | Oaxaca | Mexico | 15.98 | -96.11 | 2624 | 1594 |
| Organal | city | Oaxaca | Mexico | 17.84 | -97.46 | 7086 | 1130 |
| Orilla del Llano | city | Oaxaca | Mexico | 17.01 | -95.95 | 4189 | 3250 |
| Orilla del Llano | city | Oaxaca | Mexico | 17.00 | -96.01 | 5885 | 5577 |
| Orillas del Rio Palma | city | Oaxaca | Mexico | 16.52 | -94.83 | 131 | 10324 |
| Orozco | city | Oaxaca | Mexico | 18.29 | -96.32 | 127 | 10631 |
| Ortega | city | Oaxaca | Mexico | 18.06 | -96.13 | 134 | 45101 |
| Ostuta | city | Oaxaca | Mexico | 16.50 | -94.43 | 223 | 1123 |
| Otate | city | Oaxaca | Mexico | 17.77 | -95.20 | 190 | 7432 |
| Otates | city | Oaxaca | Mexico | 17.77 | -95.20 | 190 | 7432 |
| Otatillo | city | Oaxaca | Mexico | 16.17 | -97.28 | 4189 | 4866 |
| Otilio Montano | city | Oaxaca | Mexico | 17.15 | -94.97 | 295 | 1819 |
| Otitlán de Morelos | city | Oaxaca | Mexico | 17.39 | -96.24 | 4189 | 4028 |
| Ovieri | city | Oaxaca | Mexico | 16.35 | -96.18 | 6709 | 1368 |
| Ozolotepec | city | Oaxaca | Mexico | 16.13 | -96.37 | 7844 | 3694 |
| Ozolotepec | city | Oaxaca | Mexico | 16.07 | -96.30 | 5905 | 3877 |
| Ozolotepec | city | Oaxaca | Mexico | 16.15 | -96.35 | 7873 | 4024 |
| Ozolotepec | city | Oaxaca | Mexico | 16.10 | -96.39 | 7873 | 4007 |
| Ozolotepec | city | Oaxaca | Mexico | 16.09 | -96.41 | 7775 | 4219 |
| Ozolotepec | city | Oaxaca | Mexico | 17.29 | -95.59 | 892 | 2478 |
| Ozolotepec | city | Oaxaca | Mexico | 16.13 | -96.33 | 7637 | 4368 |
| Ozolotepec | city | Oaxaca | Mexico | 16.10 | -96.22 | 5869 | 4429 |
| Ozolotepec | city | Oaxaca | Mexico | 16.08 | -96.29 | 7549 | 3864 |
| Ozolotepec | city | Oaxaca | Mexico | 16.15 | -96.31 | 7873 | 6031 |
| Ozolotepec | city | Oaxaca | Mexico | 15.82 | -96.35 | 830 | 7082 |
| Ozumacin | city | Oaxaca | Mexico | 17.68 | -96.23 | 1748 | 4233 |
| Ozunacin | city | Oaxaca | Mexico | 17.68 | -96.23 | 1748 | 4233 |