| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oskey | city | Lac | Chad | 13.32 | 15.69 | 977 | 0 |
| Oso | city | Guera | Chad | 11.28 | 17.70 | 1669 | 596 |
| Osoro | city | Batha | Chad | 13.08 | 17.45 | 928 | 745 |
| Ossin | city | Mayo-Kebbi Est | Chad | 9.95 | 14.87 | 1118 | 5585 |
| Ossouni | city | Tibesti | Chad | 21.28 | 17.15 | 3772 | 0 |