| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oshup | city | Vorumaa | Estonia | 57.62 | 27.03 | 830 | 567 |
| Osmussaare | city | Laanemaa | Estonia | 59.29 | 23.39 | 16 | 11 |
| Osterby | city | Laanemaa | Estonia | 58.99 | 23.52 | 32 | 6056 |
| Ostrova | city | Vorumaa | Estonia | 57.78 | 27.44 | 341 | 744 |
| Osula | city | Vorumaa | Estonia | 57.89 | 26.82 | 246 | 760 |