| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oostrem | city | Vlaanderen | Belgium | 51.03 | 3.86 | 9 | 40291 |
| Oostroosebeke | city | Vlaanderen | Belgium | 50.92 | 3.34 | 49 | 41517 |
| Oostroozebeke | city | Vlaanderen | Belgium | 50.92 | 3.34 | 49 | 41517 |
| Oostrozebeke | city | Vlaanderen | Belgium | 50.92 | 3.34 | 49 | 41517 |
| Oostrum | city | Fryslan | Netherlands | 53.33 | 6.06 | 3 | 14550 |
| Oostrum | city | Limburg | Netherlands | 51.53 | 6.02 | 68 | 31231 |