UpAlphabetical listing of Places in Departamento de Moquegua
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Ocololune | city | Departamento de Moquegua | Peru | -16.70 | -70.47 | 14734 | 149 |
| Ocoyita Grande Hacienda | city | Departamento de Moquegua | Peru | -17.17 | -70.94 | 4865 | 27590 |
| Ojos de Agua | city | Departamento de Moquegua | Peru | -16.93 | -70.68 | 14557 | 583 |
| Olival Nuevo | city | Departamento de Moquegua | Peru | -17.58 | -71.22 | 1919 | 40 |
| Omate | city | Departamento de Moquegua | Peru | -16.68 | -70.98 | 7152 | 2342 |
| Omo | city | Departamento de Moquegua | Peru | -17.25 | -70.98 | 4048 | 11412 |
| Omo Chico | city | Departamento de Moquegua | Peru | -17.25 | -70.98 | 4048 | 11412 |
| Oquehuaico | city | Departamento de Moquegua | Peru | -16.42 | -70.48 | 14980 | 167 |
| Orival Nuevo | city | Departamento de Moquegua | Peru | -17.58 | -71.22 | 1919 | 40 |
| Orlaque | city | Departamento de Moquegua | Peru | -16.59 | -71.23 | 11181 | 1011 |
| Osmore Chico | city | Departamento de Moquegua | Peru | -17.48 | -71.13 | 2591 | 0 |
| Osmore Chico | city | Departamento de Moquegua | Peru | -17.51 | -71.15 | 3494 | 0 |
| Osmore Grande | city | Departamento de Moquegua | Peru | -17.50 | -71.15 | 3280 | 0 |
| Osobaya | city | Departamento de Moquegua | Peru | -16.94 | -71.33 | 4570 | 92 |
| Otora | city | Departamento de Moquegua | Peru | -17.01 | -70.85 | 9110 | 616 |
| Ozorin | city | Departamento de Moquegua | Peru | -17.60 | -71.23 | 1620 | 150 |
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