| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Oberal | city | Departamento de Lambayeque | Peru | -5.9313889 | -79.5966667 | 2267 | 4042 |
| Oberasal | city | Departamento de Lambayeque | Peru | -5.8769444 | -79.9155556 | 515 | 3757 |
| Olelesa | city | Departamento de Lambayeque | Peru | -6.0375 | -79.2597222 | 8923 | 8091 |
| Olleria | city | Departamento de Lambayeque | Peru | -6.5008333 | -79.9983333 | 380 | 3757 |
| Olmos | city | Departamento de Lambayeque | Peru | -5.9847222 | -79.7452778 | 751 | 3757 |
| Olos | city | Departamento de Lambayeque | Peru | -6.05 | -79.65 | 1548 | 3757 |
| Orcon Dos | city | Departamento de Lambayeque | Peru | -6.6902778 | -79.81 | 249 | 13203 |
| Orcón Dos | city | Departamento de Lambayeque | Peru | -6.6902778 | -79.81 | 249 | 13203 |
| Otoya | city | Departamento de Lambayeque | Peru | -6.5666667 | -79.8166667 | 479 | 5645 |
| Otra Banda | city | Departamento de Lambayeque | Peru | -6.9427778 | -79.5802778 | 295 | 31578 |
| Oyontun | city | Departamento de Lambayeque | Peru | -6.8519444 | -79.3036111 | 1190 | 31564 |
| Oyontún | city | Departamento de Lambayeque | Peru | -6.8519444 | -79.3036111 | 1190 | 31564 |
| Oyotun | city | Departamento de Lambayeque | Peru | -6.8519444 | -79.3036111 | 1190 | 31564 |
| Oyotún | city | Departamento de Lambayeque | Peru | -6.8519444 | -79.3036111 | 1190 | 31564 |