| Name of settlement |
Cyrillic name |
District |
Region |
Page ID |
Latitude |
Longitude |
O |
| Ob | Îáü | Novosibirskiy | Novosibirsk Oblast | WS-19 | 54°59' | 82°43' |
| Obluche | Îáëó÷üå | Obluchenskiy | Yevreyskaya Autonomous Region | FE-11 | 49°00' | 131°03' |
| Obozerskiy | Îáîçåðñêèé | Plesetskiy | Arkhangelsk Oblast | ER-08 | 63°27' | 40°19' |
| Obyachevo | Îáúÿ÷åâî | Priluzskiy | Republic of Komi | ER-19 | 60°20' | 49°36' |
| Ocher | Î÷åð | Ocherskiy | Perm Oblast | ER-13 | 57°53' | 54°43' |
| Ogodzha | Îãîäæà | Selemdzhinskiy | Amur Oblast | FE-07 | 52°45' | 132°32' |
| Ogorodtakh | Îãîðîäòàõ | Ust-aldanskiy | Republic of Sakha (Yakutia) | FE-B | 62°26' | 130°07' |
| Ogoron | Îãîðîí | Zeyskiy | Amur Oblast | FE-03 | 53°57' | 129°07' |
| Okha | Îõà | Okhinskiy | Sakhalin Oblast | FE-06 | 53°34' | 142°56' |
| Okhotskiy Perevoz | Îõîòñêèé Ïåðåâîç | Tomponskiy | Republic of Sakha (Yakutia) | FE-C | 61°52' | 135°31' |
| Oksino | Îêñèíî | Nenets | Nenets Autonomous District | ER-05 | 67°34' | 52°11' |
| Oksovskiy | Îêñîâñêèé | Plesetskiy | Arkhangelsk Oblast | ER-08 | 62°36' | 39°55' |
| Oktyabrskiy | Îêòÿáðüñêèé | Ust-bolsheretskiy | Kamchatka Oblast | KK-03 | 52°39' | 156°14' |
| Oktyabrskoe | Îêòÿáðüñêîå | Oktyabrskiy | Khanty-Mansi | WS-05 | 62°27' | 66°01' |
| Olekminsk | Îëåêìèíñê | Olekminskiy | Republic of Sakha (Yakutia) | FE-A | 60°22' | 120°25' |
| Olenegorsk | Îëåíåãîðñê | Monchegorsk | Murmansk Oblast | ER-01 | 68°08' | 33°16' |
| Olenitsa | Îëåíèöà | Terskiy | Murmansk Oblast | ER-02 | 66°28' | 35°20' |
| Olga | Îëüãà | Olginskiy | Primorskiy Kray | FE-15 | 43°44' | 135°17' |
| Oma | Îìà | Nenets | Nenets Autonomous District | ER-04 | 66°38' | 46°29' |
| Omutinskoe | Îìóòèíñêîå | Omutinskiy | Tyumen Oblast | WS-12 | 56°28' | 67°39' |
| Onega | Îíåãà | Onezhskiy | Arkhangelsk Oblast | ER-08 | 63°54' | 38°06' |
| Onguday | Îíãóäàé | Ongudayskiy | Republic of Altay | WS-23 | 50°44' | 86°07' |
| Onguren | Îíãóðåí | Olkhonskiy | Irkutsk Oblast | ES-17 | 53°38' | 107°35' |
| Onnes | Îííåñ | Amginskiy | Republic of Sakha (Yakutia) | FE-B | 60°28' | 131°05' |
| Onokhoy | Îíîõîé | Zaigraevskiy | Republic of Buryatia | ES-25 | 51°55' | 108°04' |
| Oparino | Îïàðèíî | Oparinskiy | Kirov Oblast | ER-19 | 59°50' | 48°17' |
| Ordynskoe | Îðäûíñêîå | Ordynskiy | Novosibirsk Oblast | WS-18 | 54°21' | 81°53' |
| Ordzhonikidzevskiy | Îðäæîíèêèäçåâñêèé | Ordzhonikidzevskiy | Republic of Khakassia | WS-20 | 54°46' | 88°57' |
| Orenburg | Îðåíáóðã | Orenburg | Orenburg Oblast | ER-14 | 51°46' | 55°06' |
| Orlik | Îðëèê | Okinskiy | Republic of Buryatia | ES-23 | 52°31' | 99°49' |
| Orlovka | Îðëîâêà | Kyshtovskiy | Novosibirsk Oblast | WS-14 | 56°56' | 76°19' |
| Orto-Nakhara | Îðòî-Íàõàðà | Lenskiy | Republic of Sakha (Yakutia) | ES-C;
FE-A | 60°49' | 114°19' |
| Osharovo | Îøàðîâî | Baykitskiy | Evenk | ES-03 | 60°22' | 98°19' |
| Osinniki | Îñèííèêè | Osinniki | Kemerovo Oblast | WS-20 | 53°36' | 87°19' |
| Osinovka | Îñèíîâêà | Bratskiy | Irkutsk Oblast | ES-07 | 56°17' | 101°52' |
| Oskino | Îñüêèíî | Katangskiy | Irkutsk Oblast | ES-C | 60°48' | 107°59' |
| Ostashkov | Îñòàøêîâ | Ostashkovskiy | Tver Oblast | ER-17 | 57°07' | 33°07' |
| Ous | Îóñ | Ivdel | Sverdlovsk Oblast | WS-04 | 60°53' | 61°28' |
| Ozernovskiy | Îçåðíîâñêèé | Ust-bolsheretskiy | Kamchatka Oblast | KK-05 | 51°29' | 156°30' |
