| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Obil'noye | city | Respublika Kalmykiya | Russia | 47.5125 | 44.4177778 | 282 | 466 |
| Obil'noye | city | Respublika Kalmykiya | Russia | 47.2352778 | 44.5013889 | 121 | 299 |
| Obil'nyy | city | Respublika Kalmykiya | Russia | 47.2352778 | 44.5013889 | 121 | 299 |
| Obrochnoye | city | Respublika Kalmykiya | Russia | 47.5986111 | 44.0602778 | 321 | 540 |
| Ochir | city | Respublika Kalmykiya | Russia | 47.5913889 | 44.9413889 | 19 | 338 |
| Ochirin-Buluk | city | Respublika Kalmykiya | Russia | 47.55 | 45.5666667 | 3 | 252 |
| Oktyabr'skiy | city | Respublika Kalmykiya | Russia | 46.1741667 | 42.79 | 118 | 1018 |
| Oktyabr'skiy | city | Respublika Kalmykiya | Russia | 46.3069444 | 43.1080556 | 108 | 598 |
| Olenichevo | city | Respublika Kalmykiya | Russia | 45.5722222 | 47.1616667 | -68 | 610 |
| Oling | city | Respublika Kalmykiya | Russia | 46.2483333 | 45.28 | -3 | 173 |
| Omadyk | city | Respublika Kalmykiya | Russia | 47.9172222 | 45.1022222 | 6 | 324 |
| Omakeyev | city | Respublika Kalmykiya | Russia | 47.2769444 | 44.8602778 | 6 | 299 |
| Omn-Keryul'chi | city | Respublika Kalmykiya | Russia | 46.8897222 | 45.0125 | 6 | 252 |
| Onon-Boro | city | Respublika Kalmykiya | Russia | 47.3816667 | 46.1697222 | 13 | 173 |
| Opytnoye | city | Respublika Kalmykiya | Russia | 47.2963889 | 44.6925 | 22 | 299 |
| Orgakinovskiy | city | Respublika Kalmykiya | Russia | 46.1066667 | 44.4297222 | 298 | 312 |
| Orgakinovskiy Shargadyk | city | Respublika Kalmykiya | Russia | 46.1066667 | 44.4297222 | 298 | 312 |
| Orgin Ula | city | Respublika Kalmykiya | Russia | 46.8119444 | 45.6613889 | 3 | 173 |
| Orlov | city | Respublika Kalmykiya | Russia | 46.4605556 | 42.0825 | 124 | 1373 |
| Orsa-Khag | city | Respublika Kalmykiya | Russia | 46.8741667 | 45.4905556 | -9 | 173 |
| Orun-Bushrun | city | Respublika Kalmykiya | Russia | 46.8988889 | 44.7713889 | 3 | 299 |
| Ovata | city | Respublika Kalmykiya | Russia | 46.8513889 | 44.3683333 | 255 | 439 |
| Ovrazhnyy | city | Respublika Kalmykiya | Russia | 46.4813889 | 44.1877778 | 206 | 481 |
| Ovrazhnyy | city | Respublika Kalmykiya | Russia | 46.6 | 44.2833333 | 479 | 481 |
| Ozernoye | city | Respublika Kalmykiya | Russia | 45.9816667 | 41.7516667 | 219 | 2139 |
| Ozernoye | city | Respublika Kalmykiya | Russia | 47.3444444 | 45.1988889 | 32 | 259 |
| Ozernyy | city | Respublika Kalmykiya | Russia | 45.9844444 | 41.7608333 | 232 | 2139 |
| Ozernyy | city | Respublika Kalmykiya | Russia | 46.5016667 | 45.0925 | -13 | 173 |
| Ozernyy | city | Respublika Kalmykiya | Russia | 47.3444444 | 45.1988889 | 32 | 259 |
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