| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oacalco | city | Morelos | Mexico | 18.93 | -99.03 | 4242 | 36471 |
| Oaxtepec | city | Morelos | Mexico | 18.91 | -98.98 | 4347 | 58283 |
| Ocopulco | city | Morelos | Mexico | 19.59 | -98.90 | 7549 | 126303 |
| Ocotenco | city | Morelos | Mexico | 19.13 | -99.45 | 8792 | 60429 |
| Ocotepec | city | Morelos | Mexico | 18.96 | -99.23 | 5869 | 76517 |
| Ocotitlan | city | Morelos | Mexico | 19.24 | -99.62 | 8753 | 245336 |
| Ocotitlán | city | Morelos | Mexico | 19.01 | -99.06 | 7073 | 12571 |
| Ocoyoacac | city | Morelos | Mexico | 19.27 | -99.46 | 8530 | 76633 |
| Ocuituco | city | Morelos | Mexico | 18.88 | -98.77 | 6276 | 20217 |
| Ojo de Agua de Cuachichinola | city | Morelos | Mexico | 18.65 | -99.36 | 3349 | 16438 |
| Olmos | city | Morelos | Mexico | 19.88 | -98.93 | 7608 | 29077 |
| Ometusco | city | Morelos | Mexico | 19.78 | -98.63 | 8389 | 17811 |
| Ometusco | city | Morelos | Mexico | 19.78 | -98.67 | 8389 | 7309 |
| Oro de Hidalgo | city | Morelos | Mexico | 19.80 | -100.13 | 9228 | 18989 |
| Otompan | city | Morelos | Mexico | 19.70 | -98.76 | 7746 | 40776 |
| Otumba | city | Morelos | Mexico | 19.70 | -98.76 | 7746 | 40776 |
| Otumba de Gómez Farías | city | Morelos | Mexico | 19.70 | -98.76 | 7746 | 40776 |
| Oxtampan | city | Morelos | Mexico | 19.78 | -100.12 | 9330 | 19776 |
| Oyamel | city | Morelos | Mexico | 19.43 | -99.58 | 8487 | 35848 |