| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Otaimont | city | Wallonie | Belgium | 50.42 | 6.02 | 1669 | 10843 |
| Otegem | city | Vlaanderen | Belgium | 50.81 | 3.42 | 98 | 33808 |
| Oteppe | city | Wallonie | Belgium | 50.58 | 5.13 | 830 | 10585 |
| Othée | city | Wallonie | Belgium | 50.71 | 5.47 | 830 | 35135 |
| Otrange | city | Wallonie | Belgium | 50.74 | 5.39 | 337 | 9888 |
| Otreppe | city | Wallonie | Belgium | 50.56 | 5.03 | 830 | 10788 |
| Ottembourg | city | Vlaanderen | Belgium | 50.75 | 4.62 | 311 | 41376 |
| Ottenbourg | city | Vlaanderen | Belgium | 50.75 | 4.62 | 311 | 41376 |
| Ottenburg | city | Vlaanderen | Belgium | 50.75 | 4.62 | 311 | 41376 |
| Ottentothoef | city | Vlaanderen | Belgium | 51.02 | 4.57 | 16 | 45086 |
| Ottentothoeve | city | Vlaanderen | Belgium | 51.02 | 4.57 | 16 | 45086 |
| Ottergem | city | Vlaanderen | Belgium | 50.93 | 3.95 | 95 | 44839 |
| Ottergemschestraat | city | Vlaanderen | Belgium | 50.78 | 3.83 | 160 | 27131 |
| Ottergemsestraat | city | Vlaanderen | Belgium | 50.78 | 3.83 | 160 | 27131 |
| Otterkant | city | Vlaanderen | Belgium | 50.88 | 3.90 | 144 | 28478 |
| Ottersem | city | Vlaanderen | Belgium | 51.02 | 3.73 | 26 | 96039 |
| Ottershoek | city | Vlaanderen | Belgium | 51.03 | 4.62 | 19 | 39820 |
| Ottershoek | city | Vlaanderen | Belgium | 51.02 | 4.53 | 19 | 53464 |
| Ottignies | city | Wallonie | Belgium | 50.67 | 4.56 | 196 | 54175 |
| Ottignies-Louvain-la-Neuve (Céroux-Mousty) | city | Wallonie | Belgium | 50.66 | 4.51 | 383 | 34066 |
| Ottignies-Louvain-la-Neuve (Limelette) | city | Wallonie | Belgium | 50.68 | 4.57 | 328 | 62341 |
| Ottignies-Louvain-la-Neuve (Louvain-la-Neuve) | city | Wallonie | Belgium | 50.67 | 4.61 | 830 | 46135 |
| Ottignies-Louvain-la-Neuve (Ottignies) | city | Wallonie | Belgium | 50.67 | 4.56 | 196 | 54175 |
| Ottré | city | Wallonie | Belgium | 50.25 | 5.84 | 1781 | 1775 |