| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Obaku | city | | Nigeria | 4.9244444 | 6.8230556 | 1315 | 37351 |
| Obelle | city | | Nigeria | 5.091667 | 6.8211111 | 1177 | 20010 |
| Obia | city | | Nigeria | 4.8402778 | 7.0408333 | 1496 | 155717 |
| Obitie | city | | Nigeria | 4.9230556 | 6.84 | 1295 | 25224 |
| Obogo | city | | Nigeria | 4.9394444 | 6.775 | 1289 | 48668 |
| Obono | city | | Nigeria | 5.1369444 | 6.9869444 | 567 | 33611 |
| Obukwu | city | | Nigeria | 5.1266667 | 6.995 | 551 | 33611 |
| Odagba | city | | Nigeria | 4.9666667 | 7.0905556 | 498 | 37297 |
| Oduoha | city | | Nigeria | 4.9219444 | 6.8361111 | 1312 | 25224 |
| Oduoha | city | | Nigeria | 4.8191667 | 6.9127778 | 1161 | 163534 |
| Ogali | city | | Nigeria | 4.7863889 | 7.1275 | 1384 | 67026 |
| Ogbakiri | city | | Nigeria | 4.7963889 | 6.9127778 | 1164 | 163534 |
| Ogbamafa | city | | Nigeria | 4.8497222 | 6.8463889 | 1443 | 78528 |
| Ogbodo | city | | Nigeria | 4.8761111 | 6.9891667 | 1512 | 84256 |
| Ogbogoro | city | | Nigeria | 4.8466667 | 6.9305556 | 1223 | 129721 |
| Ogbokiri | city | | Nigeria | 4.7963889 | 6.9127778 | 1164 | 163534 |
| Ogboro | city | | Nigeria | 4.8761111 | 6.9891667 | 1512 | 84256 |
| Ogidigba | city | | Nigeria | 4.825 | 7.0419444 | 1492 | 161320 |
| Ogigba | city | | Nigeria | 4.825 | 7.0419444 | 1492 | 161320 |
| Okirika | city | | Nigeria | 4.765 | 6.9919444 | 1541 | 385131 |
| Okohia | city | | Nigeria | 5.22 | 6.9177778 | 698 | 24434 |
| Okojagu | city | | Nigeria | 4.7925 | 7.0697222 | 1466 | 161320 |
| Okoro | city | | Nigeria | 4.7861111 | 7.06 | 1482 | 176243 |
| Okoroagu | city | | Nigeria | 4.9855556 | 7.0866667 | 492 | 37297 |
| Okpo | city | | Nigeria | 4.7966667 | 6.7955556 | 1040 | 94683 |
| Okpo | city | | Nigeria | 4.8688889 | 6.9102778 | 1207 | 105293 |
| Okporowo | city | | Nigeria | 4.8313889 | 6.8988889 | 1233 | 163534 |
| Okpuruta | city | | Nigeria | 4.7777778 | 6.9127778 | 1131 | 209523 |
| Okupuruta | city | | Nigeria | 4.7777778 | 6.9127778 | 1131 | 209523 |
| Ola-Rumuodogo | city | | Nigeria | 4.8872222 | 6.7891667 | 1305 | 53049 |
| Omema | city | | Nigeria | 4.9652778 | 7.025 | 833 | 31869 |
| Omo Doga | city | | Nigeria | 5.1722222 | 6.7977778 | 1062 | 20656 |
| Omo Nwa | city | | Nigeria | 5.0697222 | 6.8869444 | 1069 | 20613 |
| Omodema | city | | Nigeria | 5.0858333 | 6.9558333 | 715 | 27478 |
| Omoecheigbo | city | | Nigeria | 5.05 | 6.9641667 | 744 | 31389 |
| Omunwe | city | | Nigeria | 4.9722222 | 7.0208333 | 820 | 31869 |
| Omuochi | city | | Nigeria | 4.9127778 | 6.8994444 | 1249 | 53377 |
| Omuokiri | city | | Nigeria | 4.9236111 | 6.9294444 | 1279 | 23663 |
| Oporoma | city | | Nigeria | 4.7988889 | 6.8447222 | 1312 | 104029 |
| Opudegema | city | | Nigeria | 4.7613889 | 6.7713889 | 885 | 133079 |
| Orogbum | city | | Nigeria | 4.7908333 | 7.0119444 | 1525 | 289982 |
| Orotoh | city | | Nigeria | 4.8716667 | 6.9016667 | 1217 | 105293 |
| Orowokwo-Woji | city | | Nigeria | 4.8172222 | 6.9841667 | 1482 | 257539 |
| Oroworokwo | city | | Nigeria | 4.8105556 | 7.0208333 | 1512 | 222781 |
| Orugborkiri | city | | Nigeria | 4.8444444 | 6.7830556 | 784 | 58217 |
| Osogu | city | | Nigeria | 4.8625 | 6.7638889 | 669 | 58217 |
| Osuogu | city | | Nigeria | 4.8625 | 6.7638889 | 669 | 58217 |
| Owofi | city | | Nigeria | 4.8177778 | 6.9566667 | 1335 | 240004 |
| Owu | city | | Nigeria | 5.2188889 | 6.9966667 | 508 | 26924 |
| Ozuaha | city | | Nigeria | 5.0569444 | 6.9225 | 915 | 25102 |
| Ozuaha | city | | Nigeria | 4.9680556 | 6.9886111 | 994 | 25582 |
| Ozuoba | city | | Nigeria | 4.8788889 | 6.9222222 | 1249 | 66144 |
| Ozuzu | city | | Nigeria | 5.1475 | 6.9961111 | 521 | 33611 |
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