| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oeëlen | city | Chukotskiy Avtonomnyy Okrug | Russia | 66.17 | -169.80 | 3 | 0 |
| Olovannyy | city | Chukotskiy Avtonomnyy Okrug | Russia | 66.18 | -179.01 | 0 | 0 |
| Olovyannaya | city | Chukotskiy Avtonomnyy Okrug | Russia | 66.18 | -179.01 | 0 | 0 |
| Omocha | city | Chukotskiy Avtonomnyy Okrug | Russia | 64.78 | 175.93 | 216 | 0 |
| Omocha Kitchen | city | Chukotskiy Avtonomnyy Okrug | Russia | 64.78 | 175.93 | 216 | 0 |
| Omolon | city | Chukotskiy Avtonomnyy Okrug | Russia | 65.23 | 160.54 | 866 | 0 |
| Omryl'kot | city | Chukotskiy Avtonomnyy Okrug | Russia | 64.93 | 174.03 | 42 | 0 |
| Omryl’kot | city | Chukotskiy Avtonomnyy Okrug | Russia | 64.93 | 174.03 | 42 | 0 |
| Orlovskaya | city | Chukotskiy Avtonomnyy Okrug | Russia | 64.15 | 169.33 | 830 | 0 |
| Orlovskaya Povarnya | city | Chukotskiy Avtonomnyy Okrug | Russia | 64.15 | 169.33 | 830 | 0 |
| Oselkino | city | Chukotskiy Avtonomnyy Okrug | Russia | 64.75 | 170.13 | 108 | 0 |
| Ostrovnoe | city | Chukotskiy Avtonomnyy Okrug | Russia | 68.11 | 164.17 | 370 | 0 |
| Ostrovnoye | city | Chukotskiy Avtonomnyy Okrug | Russia | 68.11 | 164.17 | 370 | 0 |
| Otrozhnyy | city | Chukotskiy Avtonomnyy Okrug | Russia | 65.12 | 172.80 | 259 | 0 |
| Otrozjnyj | city | Chukotskiy Avtonomnyy Okrug | Russia | 65.12 | 172.80 | 259 | 0 |
| Ouelen | city | Chukotskiy Avtonomnyy Okrug | Russia | 66.17 | -169.80 | 3 | 0 |
| Ozërnyy | city | Chukotskiy Avtonomnyy Okrug | Russia | 66.40 | -179.13 | 82 | 0 |