| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oostacker | city | Vlaanderen | Belgium | 51.10 | 3.77 | 9 | 87601 |
| Oostakker | city | Vlaanderen | Belgium | 51.10 | 3.77 | 9 | 87601 |
| Oostanaula | city | Georgia | United States | 34.48 | -85.01 | 830 | |
| Oostandjes | city | Free State | South Africa | -29.45 | 25.47 | 4589 | 94 |
| Oostappen | city | Noord-Brabant | Netherlands | 51.44 | 5.72 | 78 | 41810 |