| Oorzhak Eres-ool Lundup-Dorzhu b. 15.03.1943 · Registered · Patriots of Russia | Regional assembly, Tuva Republic, 2006 08.10.2006 · Tuva Republic |
| Oparin Aleksandr Aleksandrovich b. 15.04.1952 · Registered · CPRF | Repeat · Regional assembly, Ulyanovsk Oblast, 2004 14.03.2004 · Ulyanovsk Oblast |
| Oparin Kirill Olegovich b. 12.05.1966 · Registered · United Russia | Regional assembly, Saint Petersburg, 2007 11.03.2007 · Saint Petersburg |
| Oparyshev Stepan Stepanovich b. 1987 · Registered · LDPR | Governor, Kaluga Oblast, 2025 14.09.2025 · Kaluga Oblast |
| Oparyshev Stepan Stepanovich b. 1987 · Registered · LDPR | Regional assembly, Kaluga Oblast, 2025 14.09.2025 · Kaluga Oblast |
| Opey-ool Pavel Maadyr-oolovich b. 24.01.1979 · Registered · CPRF | Repeat · Regional assembly, Tuva Republic, 2007 11.03.2007 · Tuva Republic |
| Opolev Vladislav Radievich b. 1993 · Registered · Party of Pensioners | Regional assembly, Novosibirsk Oblast, 2025 14.09.2025 · Novosibirsk Oblast |
| Opyakin Vasiliy Grigorevich b. 12.01.1947 · Registered · CPRF | Regional assembly, Arkhangelsk Oblast, 2004 19.12.2004 · Arkhangelsk Oblast |
| Oraina Tamara Ivanovna b. 17.12.1950 · Registered · CPRF | Regional assembly, Chuvash Republic, 2006 08.10.2006 · Chuvash Republic |
| Orbidan Anna Andreevna b. 1995 · Registered · New People | Regional assembly, Novosibirsk Oblast, 2025 14.09.2025 · Novosibirsk Oblast |
| Ordashov Kerim Magomedovich b. 1987 · Registered · LDPR | Regional assembly, Republic of Dagestan, 2026 20.09.2026 · Republic of Dagestan |
| Ordin Gennadiy Gennadevich b. 15.09.1947 · Registered · LDPR | Regional assembly, Vologda Oblast, 2002 24.03.2002 · Vologda Oblast |
| Ordin Igor Vasilevich b. 07.05.1966 · Registered · United Russia | Regional assembly, Vologda Oblast, 2007 11.03.2007 · Vologda Oblast |
| Ordynskiy Viktor Vladimirovich b. 24.10.1960 · Registered · Yabloko | Regional assembly, Kaliningrad Oblast, 2006 12.03.2006 · Kaliningrad Oblast |
| Orel Viktor Alekseevich b. 1964 · Registered · LDPR | Regional assembly, Sevastopol, 2019 08.09.2019 · Sevastopol |
| Orel Roza Vitalevna b. 05.07.1957 · Registered · LDPR | Regional assembly, Voronezh Oblast, 2001 25.03.2001 · Voronezh Oblast |
| Orekhov Dmitriy Sergeevich b. 1982 · Registered · United Russia | Regional assembly, Kaluga Oblast, 2025 14.09.2025 · Kaluga Oblast |
| Orekhov Ivan Sergeevich b. 1985 · Registered · United Russia | Regional assembly, Republic of Adygea, 2026 20.09.2026 · Republic of Adygea |
| Orekhov Sergey Anatolevich b. 07.09.1974 · Registered · LDPR | Regional assembly, Leningrad Oblast, 2001 16.12.2001 · Leningrad Oblast |
| Oreshkina Margarita Nikolaevna b. 2003 · Registered · New People | Regional assembly, Republic of Mordovia, 2026 20.09.2026 · Republic of Mordovia |
| Orlov Aleksandr Borisovich b. 31.01.1962 · Registered · United Russia | Regional assembly, Perm Krai, 2006 03.12.2006 · Perm Krai |
| Orlov Viktor Nikolaevich b. 1977 · Registered · United Russia | Regional assembly, Republic of Adygea, 2026 20.09.2026 · Republic of Adygea |
| Orlov Vladimir Dmitrievich b. 20.01.1953 · Registered · United Russia | Regional assembly, Kurgan Oblast, 2004 28.11.2004 · Kurgan Oblast |
| Orlov Ivan Alekseevich b. 2003 · Registered · A Just Russia | Regional assembly, Novosibirsk Oblast, 2025 14.09.2025 · Novosibirsk Oblast |
| Orlov Igor Gurievich b. 1955 · Registered · CPRF | Regional assembly, Belgorod Oblast, 2025 14.09.2025 · Belgorod Oblast |
| Orlov Oleg Gennadevich b. 25.11.1955 · Registered · Party of Pensioners | State Duma, 2003 07.12.2003 · Russian Federation |
| Orlov Semen Nikolaevich b. 1997 · Registered · Communists of Russia | Regional assembly, Ryazan Oblast, 2025 14.09.2025 · Ryazan Oblast |
| Orlov Sergey Aleksandrovich b. 1989 · Registered · CPRF | Regional assembly, Republic of Karelia, 2026 20.09.2026 · Republic of Karelia |
| Orlov Sergey Yurevich b. 17.03.1955 · Registered · LDPR | Regional assembly, Arkhangelsk Oblast, 2004 19.12.2004 · Arkhangelsk Oblast |
| Orlov Sergey Yurevich b. 17.03.1955 · Registered · LDPR | Regional assembly, Arkhangelsk Oblast, 2004 19.12.2004 · Arkhangelsk Oblast |
| Orlov Yuriy Nikolaevich b. 26.04.1969 · Registered · Patriots of Russia | Regional assembly, Astrakhan Oblast, 2006 08.10.2006 · Astrakhan Oblast |
| Orlov Yuriy Nikolaevich b. 26.04.1969 · Registered · Patriots of Russia | Regional assembly, Astrakhan Oblast, 2006 08.10.2006 · Astrakhan Oblast |
| Orlov Yuriy Nikolaevich b. 31.07.1957 · Registered · Rodina | Regional assembly, Tambov Oblast, 2005 18.12.2005 · Tambov Oblast |
| Orlova Anna Nikolaevna b. 10.01.1942 · Registered · CPRF | Regional assembly, Tula Oblast, 2000 01.10.2000 · Tula Oblast |
| Orlova Galina Yakovlevna b. 1950 · Registered · United Russia | Regional assembly, Republic of Adygea, 2026 20.09.2026 · Republic of Adygea |
| Orlova Nina Andreevna b. 1982 · Registered · Party of Pensioners | By-election · Regional assembly, Tula Oblast, 2026 20.09.2026 · Tula Oblast |
| Orlova Tamara Sergeevna b. 27.12.1940 · Registered · CPRF | Regional assembly, Perm Krai, 2006 03.12.2006 · Perm Krai |
| Orlyanskiy Maksim Sergeevich b. 03.02.1980 · Registered · LDPR | Regional assembly, Novosibirsk Oblast, 2005 11.12.2005 · Novosibirsk Oblast |
| Orlyanskiy Maksim Sergeevich b. 03.02.1980 · Registered · LDPR | Regional assembly, Novosibirsk Oblast, 2005 11.12.2005 · Novosibirsk Oblast |
| Ortman Larisa Evgenevna b. 1966 · Registered · New People | Regional assembly, Novosibirsk Oblast, 2025 14.09.2025 · Novosibirsk Oblast |
| Orudzhev Vladimir Orudzhevich b. 29.05.1963 · Registered · Patriots of Russia | Regional assembly, Republic of Dagestan, 2007 11.03.2007 · Republic of Dagestan |
| Orudzhev Magomed Orudzhevich b. 17.03.1960 · Registered · Patriots of Russia | Regional assembly, Republic of Dagestan, 2007 11.03.2007 · Republic of Dagestan |
| Orudzhev Yarakhmed Orudzhevich b. 30.10.1955 · Registered · Patriots of Russia | Regional assembly, Republic of Dagestan, 2007 11.03.2007 · Republic of Dagestan |
| Orudzhov Eldar Gyrkhlyarovich b. 1988 · Registered · A Just Russia | Regional assembly, Republic of Dagestan, 2026 20.09.2026 · Republic of Dagestan |
| Orfenov Oleg Evgenevich b. 15.12.1976 · Registered · Patriots of Russia | Regional assembly, Kursk Oblast, 2006 12.03.2006 · Kursk Oblast |
| Orshulevich Oleg Vladimirovich b. 1962 · Registered · Party of Pensioners | Regional assembly, Novosibirsk Oblast, 2025 14.09.2025 · Novosibirsk Oblast |
| Osadchaya Viktoriya Viktorovna b. 1979 · Registered · Communists of Russia | By-election · Regional assembly, Rostov Oblast, 2026 20.09.2026 · Rostov Oblast |
| Osadchaya Zhannat Doskenovna b. 03.01.1956 · Registered · A Just Russia | Regional assembly, Pskov Oblast, 2007 11.03.2007 · Pskov Oblast |
| Osadchaya Tatyana Nikolaevna b. 1970 · Registered · United Russia | Regional assembly, Novosibirsk Oblast, 2025 14.09.2025 · Novosibirsk Oblast |
| Osadchiy Ivan Mikhaylovich b. 25.06.1981 · Registered · LDPR | Regional assembly, Novosibirsk Oblast, 2005 11.12.2005 · Novosibirsk Oblast |
