| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ojamaa | city | Kymenlaakso | Finland | 60.85 | 26.78 | 183 | 15812 |
| Okka | city | Kymenlaakso | Finland | 61.10 | 26.75 | 239 | 184 |
| Onkamaa | city | Kymenlaakso | Finland | 60.65 | 27.40 | 147 | 222 |
| Oravala | city | Kymenlaakso | Finland | 60.97 | 26.60 | 265 | 5857 |