201. Ouloual, Dosso
202. Oumaraoua, Diffa
203. Oumarawa, Diffa
204. Oumarawa, Maradi
205. Oumarou Dakili, Maradi
206. Oumba, Maradi
207. Oumgali, Zinder
208. Oumissoui Balia, Diffa
209. Oumora, Niamey
210. Ouna, Dosso
211. Ounankara, Agadez
212. Ounde, Dosso
213. Ounde Sayoou, Dosso
214. Oundougoume, Dosso
215. Oungara, Niamey
216. Ouniassa, Agadez
217. Ounissouei, Diffa
218. Ounissoui, Diffa
219. Ounissoui, Diffa
220. Ounissoui Baba, Diffa
221. Ounissoui Karemi, Diffa
222. Ounissoui Taraouska, Diffa
223. Ounissoui Yalabe, Diffa
224. Ounisswi Tarouska, Diffa
225. Ouoenesseli, Maradi

226. Ouol Ouol, Diffa
227. Ouollak, Agadez
228. Ouollak, Agadez
229. Ouolle Sonoso, Agadez
230. Ouondi, Diffa
231. Ouorio, Diffa
232. Ouorzou, Tahoua
233. Ouossebangou, Niamey
234. Oupounofwanou, Niamey
235. Oura, Maradi
236. Oura Kaji, Maradi
237. Oura Tondi
238. Ourafane, Maradi
239. Ourakosse, Dosso
240. Ourankara, Agadez
241. Ouraren, Agadez
242. Ourarene, Agadez
243. Ourarene, Agadez
244. Ouratondi, Niamey
245. Ouratondi
246. Oure, Diffa
247. Oure Souldou, Niamey
248. Ouridinga, Diffa
249. Ourimizar, Tahoua
250. Ourindo, Zinder