O
| Name | Latitude | Longitude | Diameter (km) | Named after |
|---|---|---|---|---|
| O'Connor | -26 | 143.9 | 30.4 | Flannery O'Connor. |
| O'Keeffe | 24.5 | 228.8 | 76.9 | Georgia O'Keeffe, American artist (1887–1986). |
| Oakley | -29.3 | 310.5 | 18.4 | Annie Oakleycd, American sharpshooter, entertainer (1860–1926). |
| Obukhova | 70.7 | 289.7 | 46 | Nadezhda Obukhova, Soviet singer (1886–1961). |
| Odarka | 40.8 | 138.2 | 7 | Ukrainian first name. |
| Odikha | -41.6 | 238.1 | 10.6 | Uzbek first name. |
| Odilia | 81.2 | 200.2 | 20.8 | Portuguese first name. |
| Ogulbek | 2.4 | 145 | 6.5 | Turkman first name. |
| Oivit | -73.9 | 195.5 | 4.8 | Cheyenne first name. |
| Oksana | 11.9 | 352 | 7.7 | Ukrainian first name. |
| Oku | -64.2 | 232.2 | 13.3 | Karelian first name. |
| Olena | 10.9 | 149 | 7 | Ukrainian first name. |
| Olesnicka | 18.3 | 210.9 | 33 | Zofia Oleśnicka, Polish poet (fl. c. 1550). |
| Olesya | 5.6 | 273.3 | 12 | Ukrainian first name. |
| Olga | 26.1 | 283.8 | 15.5 | Russian first name. |
| Olivia | 37.2 | 207.9 | 10.2 | Dutch first name. |
| Olya | 51.4 | 291.8 | 13.4 | Russian first name. |
| Oma | -42.7 | 329.1 | 7.6 | Sioux first name. |
| Onissya | -25.6 | 150.2 | 8.2 | Komi-Permyak (Urals Finn) first name. |
| Opika | -57.1 | 151.9 | 9.8 | Chuvash (Volga area) first name. |
| Orczy | 3.7 | 52.3 | 26.9 | Emmuska Orczy, Hungarian novelist, playwright (1865–1947). |
| Orguk | -23.5 | 198.2 | 11.7 | Nivkhi (Amur River area, E. Siberia) first name. |
| Orlette | -68.1 | 193.3 | 12.5 | French first name. |
| Orlova | 56.5 | 235 | 19.6 | Lyubov Orlova, Soviet actress (1902–1975). |
| Ortensia | 7.6 | 155.7 | 7 | Italian first name. |
| Oshalche | 29.7 | 155.5 | 8.3 | Mari (Volga Finn) first name. |
| Osipenko | 71.2 | 321 | 30 | Polina, Soviet aviator (1907–1939). |
| Ottavia | -47.5 | 187.1 | 12.9 | Roman first name. |
| Outi | 61.6 | 267.7 | 10.5 | Finnish first name. |
Read more about this topic: List Of Craters On Venus