| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Ona Dikonde | city | | Congo (Dem. Republic of The)-(Zaire) | -3.8666667 | 24.1666667 | 2024 | 1601 |
| Onadikondo | city | | Congo (Dem. Republic of The)-(Zaire) | -3.8666667 | 24.1666667 | 2024 | 1601 |
| Onawembo | city | | Congo (Dem. Republic of The)-(Zaire) | -3.7333333 | 24.4666667 | 1988 | 1601 |
| Onawembu | city | | Congo (Dem. Republic of The)-(Zaire) | -3.7333333 | 24.4666667 | 1988 | 1601 |
| Onayetsha | city | | Congo (Dem. Republic of The)-(Zaire) | -3.7 | 23.5 | 2017 | 4970 |
| Ondia | city | | Congo (Dem. Republic of The)-(Zaire) | 2.8666667 | 30.8833333 | 4337 | 17063 |
| Ondja-Penge | city | | Congo (Dem. Republic of The)-(Zaire) | -3.6166667 | 24.5833333 | 2004 | 1601 |
| Ondjeke | city | | Congo (Dem. Republic of The)-(Zaire) | -3.2333333 | 24.4666667 | 1998 | 1601 |
| Ondjembe | city | | Congo (Dem. Republic of The)-(Zaire) | -4.3833333 | 24.7666667 | 2011 | 1553 |
| Ondjo | city | | Congo (Dem. Republic of The)-(Zaire) | -2.75 | 23.6166667 | 1702 | 1605 |
| Ondolia | city | | Congo (Dem. Republic of The)-(Zaire) | 2.95 | 30.7666667 | 4179 | 15736 |
| Ondombikagba | city | | Congo (Dem. Republic of The)-(Zaire) | 2.9833333 | 29.4166667 | 2759 | 1190 |
| Ondua | city | | Congo (Dem. Republic of The)-(Zaire) | -4.1666667 | 24.5166667 | 1998 | 1601 |
| Onema | city | | Congo (Dem. Republic of The)-(Zaire) | -3.0166667 | 23.4833333 | 1998 | 4970 |
| Onema | city | | Congo (Dem. Republic of The)-(Zaire) | -3.8666667 | 23.5666667 | 2053 | 4970 |
| Onema | city | | Congo (Dem. Republic of The)-(Zaire) | -3.7666667 | 23.9166667 | 1617 | 3493 |
| Onema | city | | Congo (Dem. Republic of The)-(Zaire) | -4.55 | 24.5166667 | 2001 | 1302 |
| Onema Danga | city | | Congo (Dem. Republic of The)-(Zaire) | -3.6833333 | 23.4333333 | 2076 | 4970 |
| Onema Denga | city | | Congo (Dem. Republic of The)-(Zaire) | -3.6833333 | 23.4333333 | 2076 | 4970 |
| Onema Kolo | city | | Congo (Dem. Republic of The)-(Zaire) | -3.7666667 | 23.9166667 | 1617 | 3493 |
| Onema Lutabe | city | | Congo (Dem. Republic of The)-(Zaire) | -3.4333333 | 23.1 | 1492 | 4787 |
| Onema Taka | city | | Congo (Dem. Republic of The)-(Zaire) | -3.2166667 | 23.6833333 | 1998 | 4970 |
| Onema-Ututu | city | | Congo (Dem. Republic of The)-(Zaire) | -3.8166667 | 23.4 | 2020 | 4970 |
| Onema-Yandju | city | | Congo (Dem. Republic of The)-(Zaire) | -3.6666667 | 23.9 | 1564 | 4928 |
| Onemalole | city | | Congo (Dem. Republic of The)-(Zaire) | -3.1666667 | 24 | 1991 | 1601 |
| Onemia | city | | Congo (Dem. Republic of The)-(Zaire) | -4.55 | 24.5166667 | 2001 | 1302 |
| Ongane | city | | Congo (Dem. Republic of The)-(Zaire) | 3.2 | 26.9666667 | 2181 | 747 |
| Onganombe | city | | Congo (Dem. Republic of The)-(Zaire) | -3.9833333 | 23.7166667 | 2007 | 4961 |
| Ongembe | city | | Congo (Dem. Republic of The)-(Zaire) | -2.4166667 | 25.8333333 | 1673 | 1167 |
| Ongeni | city | | Congo (Dem. Republic of The)-(Zaire) | -4.6166667 | 25.1666667 | 2001 | 448 |
| Ongere | city | | Congo (Dem. Republic of The)-(Zaire) | -2.2666667 | 22.65 | 1496 | 677 |
| Ongeri | city | | Congo (Dem. Republic of The)-(Zaire) | -4.6166667 | 25.1666667 | 2001 | 448 |
| Ongoie Ebumi | city | | Congo (Dem. Republic of The)-(Zaire) | -2.1333333 | 22.45 | 1499 | 686 |
| Ongoka | city | | Congo (Dem. Republic of The)-(Zaire) | -1.3833333 | 26.0333333 | 1640 | 644 |
| Ongoka | city | | Congo (Dem. Republic of The)-(Zaire) | -1.6333333 | 27.3 | 3356 | 733 |
| Ongoke | city | | Congo (Dem. Republic of The)-(Zaire) | -1.3833333 | 26.0333333 | 1640 | 644 |
| Ongoro | city | | Congo (Dem. Republic of The)-(Zaire) | 2.6166667 | 27.5666667 | 2194 | 3955 |
| Onia-Lundu | city | | Congo (Dem. Republic of The)-(Zaire) | -4.0666667 | 24.6333333 | 1998 | 1601 |
| Oniangondo | city | | Congo (Dem. Republic of The)-(Zaire) | -2.5833333 | 23.2 | 2004 | 677 |
| Onieki | city | | Congo (Dem. Republic of The)-(Zaire) | -1.2166667 | 24.2166667 | 1499 | 518 |
| Oniene | city | | Congo (Dem. Republic of The)-(Zaire) | 2.6166667 | 27.3833333 | 2181 | 3948 |
| Oniene | city | | Congo (Dem. Republic of The)-(Zaire) | 2.65 | 27.3833333 | 2208 | 3957 |
| Onifia | city | | Congo (Dem. Republic of The)-(Zaire) | 3.3333333 | 30.85 | 3858 | 24600 |
| Oniumba | city | | Congo (Dem. Republic of The)-(Zaire) | -1.9 | 22.7333333 | 1463 | 704 |
| Oniumbi | city | | Congo (Dem. Republic of The)-(Zaire) | -3.4666667 | 23.2 | 1633 | 4970 |
| Oniumbi | city | | Congo (Dem. Republic of The)-(Zaire) | -3.35 | 23.7666667 | 1837 | 4970 |
| Onko | city | | Congo (Dem. Republic of The)-(Zaire) | -4.1166667 | 19.9833333 | 1263 | 741 |
| Onko II | city | | Congo (Dem. Republic of The)-(Zaire) | -4.1666667 | 19.9333333 | 1145 | 4378 |
| Onkwankusu | city | | Congo (Dem. Republic of The)-(Zaire) | -1.9833333 | 19.5166667 | 1259 | 1419 |
| Onlumbu | city | | Congo (Dem. Republic of The)-(Zaire) | -4 | 24.6333333 | 2030 | 1601 |
| Onokoko | city | | Congo (Dem. Republic of The)-(Zaire) | -4.8 | 24.0333333 | 2001 | 1302 |
| Ononie | city | | Congo (Dem. Republic of The)-(Zaire) | 2.9333333 | 27.8333333 | 2716 | 3948 |
| Onotanema | city | | Congo (Dem. Republic of The)-(Zaire) | -3.45 | 22.9 | 1499 | 1022 |
| Ontako | city | | Congo (Dem. Republic of The)-(Zaire) | -2.8833333 | 22.55 | 1617 | 677 |
| Onumba | city | | Congo (Dem. Republic of The)-(Zaire) | -1.9 | 22.7333333 | 1463 | 704 |
| Onziakunde | city | | Congo (Dem. Republic of The)-(Zaire) | 2.6666667 | 28.0833333 | 2608 | 3963 |