| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Obo | city | Tana River | Kenya | -1.35 | 40.00 | 269 | 3701 |
| Oda | city | Tana River | Kenya | -2.47 | 40.19 | 42 | 6556 |
| Odd | city | Tana River | Kenya | -2.47 | 40.19 | 42 | 6556 |
| Odhole | city | Tana River | Kenya | -2.51 | 40.33 | 19 | 2064 |
| Onkolde | city | Tana River | Kenya | -2.32 | 40.20 | 101 | 6245 |
| Orbu | city | Tana River | Kenya | -0.65 | 39.77 | 830 | 1375 |
| Ozi | city | Tana River | Kenya | -2.51 | 40.46 | 3 | 3101 |