| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Obelisque | city | Province de Namur | Belgium | 50.3833333 | 5.2833333 | 885 | 5693 |
| Obélisque | city | Province de Namur | Belgium | 50.3833333 | 5.2833333 | 885 | 5693 |
| Ohey | city | Province de Namur | Belgium | 50.4333333 | 5.1333333 | 820 | 12559 |
| Oignies | city | Province de Namur | Belgium | 50.0166667 | 4.6333333 | 1187 | 5505 |
| Oizy | city | Province de Namur | Belgium | 49.9 | 5.0166667 | 1305 | 2991 |
| Olloy | city | Province de Namur | Belgium | 50.0666667 | 4.6 | 721 | 4497 |
| Olloy-sur-Viroin | city | Province de Namur | Belgium | 50.0666667 | 4.6 | 721 | 4497 |
| Omezee | city | Province de Namur | Belgium | 50.2 | 4.7 | 679 | 4989 |
| Omezée | city | Province de Namur | Belgium | 50.2 | 4.7 | 679 | 4989 |
| Onhaye | city | Province de Namur | Belgium | 50.25 | 4.8333333 | 764 | 5931 |
| Onoz | city | Province de Namur | Belgium | 50.4833333 | 4.6666667 | 416 | 33515 |
| Onthaines | city | Province de Namur | Belgium | 50.2833333 | 5.0333333 | 925 | 9199 |
| Orchimont | city | Province de Namur | Belgium | 49.9 | 4.9333333 | 1135 | 2796 |
| Ordin | city | Province de Namur | Belgium | 50.4666667 | 4.7 | 295 | 33515 |
| Oret | city | Province de Namur | Belgium | 50.3 | 4.6166667 | 813 | 11093 |
| Ossogne | city | Province de Namur | Belgium | 50.4 | 5.2166667 | 895 | 5892 |
| Ostemeree | city | Province de Namur | Belgium | 50.25 | 4.7666667 | 797 | 5838 |
| Ostemerée | city | Province de Namur | Belgium | 50.25 | 4.7666667 | 797 | 5838 |
| Otreppe | city | Province de Namur | Belgium | 50.5666667 | 5.0333333 | 606 | 11440 |
| Ounes | city | Province de Namur | Belgium | 50.3333333 | 5.1333333 | 912 | 8293 |
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