| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oun | city | Borkou | Chad | 21.63 | 19.17 | 2919 | 0 |
| Ouna | city | Lac | Chad | 13.43 | 15.18 | 918 | 1290 |
| Ouni | city | Lac | Chad | 13.70 | 15.36 | 997 | 2069 |
| Ounianga Kébir | city | Ennedi-Ouest | Chad | 19.05 | 20.49 | 1669 | 0 |
| Ounianga Serir | city | Ennedi-Ouest | Chad | 18.91 | 20.88 | 1669 | 0 |
| Ountat | city | Ouaddai | Chad | 13.92 | 21.13 | 2509 | 894 |
| Ounè | city | Lac | Chad | 13.58 | 15.40 | 1003 | 2316 |