UpAlphabetical listing of Places in Nigeria
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Ono | city | Akwa Ibom | Nigeria | 5.24 | 7.87 | 830 | 47414 |
| Ono Ikot Itiat | city | Akwa Ibom | Nigeria | 5.24 | 7.87 | 830 | 47414 |
| Ono Ikot Ubo | city | Akwa Ibom | Nigeria | 5.25 | 7.87 | 830 | 47414 |
| Onoafor | city | Enugu | Nigeria | 6.37 | 7.61 | 830 | 13112 |
| Onoagbai | city | Rivers | Nigeria | 5.54 | 6.62 | 255 | 26207 |
| Onogboko | city | Delta | Nigeria | 5.46 | 6.44 | 354 | 14433 |
| Onogboko | city | Delta | Nigeria | 5.45 | 6.48 | 200 | 13972 |
| Onogholo | city | Edo | Nigeria | 6.67 | 6.50 | 830 | 9536 |
| Onoia | city | Anambra | Nigeria | 6.49 | 6.88 | 262 | 19324 |
| Onoli | city | Enugu | Nigeria | 6.05 | 7.47 | 255 | 41847 |
| Onoli Agu | city | Enugu | Nigeria | 6.04 | 7.48 | 236 | 41958 |
| Onoma | city | Anambra | Nigeria | 6.33 | 6.75 | 196 | 26761 |
| Onome | city | | Nigeria | 6.97 | 7.24 | 830 | 21756 |
| Onongisuo | city | Rivers | Nigeria | 4.53 | 6.70 | 265 | 10887 |
| Onono | city | Anambra | Nigeria | 6.20 | 6.76 | 183 | 332810 |
| Ononofu | city | Delta | Nigeria | 5.61 | 6.59 | 180 | 19254 |
| Ononsenlu-Alako | city | | Nigeria | 6.85 | 4.00 | 249 | 67876 |
| Onoporubu I | city | Delta | Nigeria | 5.62 | 5.27 | 3 | 9738 |
| Onoporubu II | city | Delta | Nigeria | 5.63 | 5.24 | 3 | 7521 |
| Onor | city | Cross River | Nigeria | 5.34 | 7.96 | 360 | 8794 |
| Onosenlu Alako | city | | Nigeria | 6.85 | 4.00 | 249 | 67876 |
| Onowa | city | Edo | Nigeria | 6.75 | 6.38 | 941 | 48882 |
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