| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ομσκ | city | Omskaya Oblast' | Russia | 55.00 | 73.40 | 265 | 200661 |
| Οριόλ | city | Orlovskaya Oblast' | Russia | 52.97 | 36.08 | 830 | 130019 |
| Ουλάν Ουντέ | city | Buryatiya | Russia | 51.83 | 107.61 | 1669 | 94918 |
| Ουλιάνοφσκ | city | Ul'yanovskaya Oblast' | Russia | 54.33 | 48.39 | 830 | 143391 |