UpAlphabetical listing of Places in Diffa
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Obricha | city | Diffa | Niger | 15.68 | 13.89 | 1213 | 0 |
| Ouanganga | city | Diffa | Niger | 14.07 | 11.11 | 1190 | 1341 |
| Ouedda | city | Diffa | Niger | 15.33 | 12.00 | 990 | 0 |
| Ouidi | city | Diffa | Niger | 14.11 | 12.99 | 980 | 0 |
| Ouiyé | city | Diffa | Niger | 14.42 | 13.39 | 944 | 0 |
| Oula | city | Diffa | Niger | 13.49 | 12.83 | 912 | 1038 |
| Oum Hadjer | city | Diffa | Niger | 15.75 | 13.71 | 1207 | 0 |
| Oumaradi | city | Diffa | Niger | 13.73 | 11.21 | 1154 | 1341 |
| Oumaraoua | city | Diffa | Niger | 14.06 | 11.18 | 1161 | 1292 |
| Oumarawa | city | Diffa | Niger | 14.06 | 11.18 | 1161 | 1292 |
| Ouondi | city | Diffa | Niger | 14.11 | 12.99 | 980 | 0 |
| Ouorio | city | Diffa | Niger | 13.78 | 13.24 | 905 | 3222 |
| Ouromi | city | Diffa | Niger | 14.53 | 13.48 | 967 | 7 |
| Oursamontou | city | Diffa | Niger | 15.20 | 12.58 | 1020 | 0 |
| Ousmandi | city | Diffa | Niger | 13.46 | 11.41 | 1194 | 1076 |
| Ouwaou | city | Diffa | Niger | 13.54 | 13.02 | 921 | 3674 |
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