| Orus-Ool Vladimir Soyanovich b. 17.01.1959 · Registered · Self-nomination | Regional assembly, Tuva Republic, 2006 08.10.2006 · Tuva Republic |
| Orus-Ool Vladimir Soyanovich b. 17.01.1959 · Registered · Voters’ group | Regional assembly, Tuva Republic, 2002 02.06.2002 · Tuva Republic |
| Orfenov Oleg Evgenevich b. 15.12.1976 · Registered · Patriots of Russia | Regional assembly, Kursk Oblast, 2006 12.03.2006 · Kursk Oblast |
| Orfenov Oleg Evgenevich b. 15.12.1976 · Registered · Patriots of Russia | Regional assembly, Kursk Oblast, 2011 13.03.2011 · Kursk Oblast |
| Ortsuev Khasan Umarovich b. 12.05.1953 · Registered · Voters’ group | Regional assembly, Chechen Republic, 2005 27.11.2005 · Chechen Republic |
| Ortskhanov Kureysh Magometovich b. 02.05.1966 · Registered · LDPR | Regional assembly, Republic of Ingushetia, 2011 04.12.2011 · Republic of Ingushetia |
| Ortskhanov Khazhibikar Alaudinovich b. 17.10.1962 · Registered · LDPR | State Duma, 2011 04.12.2011 · Russian Federation |
| Ortskhanov Khazhibikar Alaudinovich b. 17.10.1962 · Registered · LDPR | State Duma, 2007 02.12.2007 · Russian Federation |
| Ortskhanov Khazhibikar Alaudinovich b. 17.10.1962 · Registered · LDPR | Regional assembly, Republic of Ingushetia, 2011 04.12.2011 · Republic of Ingushetia |
| Orshulevich Oleg Vladimirovich b. 1962 · Registered · Party of Pensioners | Regional assembly, Novosibirsk Oblast, 2025 14.09.2025 · Novosibirsk Oblast |
| Osadets Boris Alekseevich b. 02.06.1949 · Registered · Party for Justice | Regional assembly, Sakhalin Oblast, 2012 14.10.2012 · Sakhalin 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 Zhannat Doskenovna b. 03.01.1956 · Registered · A Just Russia | State Duma, 2007 02.12.2007 · Russian Federation |
| Osadchaya Zhannat Doskenovna b. 03.01.1956 · Registered · Voters’ group | Regional assembly, Pskov Oblast, 2002 31.03.2002 · 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 |
| Osadchiy Ivan Mikhaylovich b. 25.06.1981 · Registered · LDPR | Regional assembly, Novosibirsk Oblast, 2005 11.12.2005 · Novosibirsk Oblast |
| Osadchiy Nikolay Ivanovich b. 08.12.1957 · Registered · CPRF | Governor, Krasnodar Krai, 2015 13.09.2015 · Krasnodar Krai |
| Osadchiy Sagid Olegovich b. 26.05.1983 · Registered · CPRF | Regional assembly, Kamchatka Krai, 2011 04.12.2011 · Kamchatka Krai |
| Osadchiy Sagid Olegovich b. 26.05.1983 · Registered · CPRF | Regional assembly, Kamchatka Krai, 2011 04.12.2011 · Kamchatka Krai |
| Osadchuk Andrey Mikhaylovich b. 1972 · Registered · United Russia | Regional assembly, Khanty-Mansi Autonomous Okrug – Yugra, 2026 20.09.2026 · Khanty-Mansi Autonomous Okrug |
| Osanov Vladimir Nikolaevich b. 13.04.1959 · Registered · Self-nomination | Regional assembly, Chuvash Republic, 2002 21.07.2002 · Chuvash Republic |
| Osetrov Albert Alekseevich b. 04.12.1949 · Registered · LDPR | Regional assembly, Kostroma Oblast, 2010 10.10.2010 · Kostroma Oblast |
| Osetrov Albert Alekseevich b. 04.12.1949 · Registered · LDPR | Regional assembly, Kostroma Oblast, 2010 10.10.2010 · Kostroma Oblast |
| Osetrov Vladimir Ivanovich b. 02.01.1951 · Registered · CPRF | Regional assembly, Kirov Oblast, 2006 12.03.2006 · Kirov Oblast |
| Osetrov Yuriy Anatolevich b. 28.04.1967 · Registered · A Just Russia | Early · Governor, Belgorod Oblast, 2021 19.09.2021 · Belgorod Oblast |
| Osetrov Yuriy Anatolevich b. 28.04.1967 · Registered · A Just Russia | State Duma, 2021 19.09.2021 · Russian Federation |
| Osetrov Yuriy Anatolevich b. 1967 · Registered · A Just Russia | Regional assembly, Belgorod Oblast, 2025 14.09.2025 · Belgorod Oblast |
| Osieva Ekaterina Viktorovna b. 31.12.1959 · Registered · CPRF | Regional assembly, Murmansk Oblast, 2011 04.12.2011 · Murmansk Oblast |
| Osikov Sergey Grigorevich b. 16.05.1950 · Registered · Samovydvizhenie | Regional assembly, Voronezh Oblast, 2010 14.03.2010 · Voronezh Oblast |
| Osikova Irina Petrovna b. 20.01.1969 · Registered · Voters’ group | Regional assembly, Republic of Adygea, 2006 12.03.2006 · Republic of Adygea |
| Osina Anastasiya Aleksandrovna b. 29.10.1986 · Registered · Patriots of Russia | Regional assembly, Chelyabinsk Oblast, 2010 10.10.2010 · Chelyabinsk Oblast |
| Osinin Kirill Sergeevich b. 28.08.1977 · Registered · Party of Growth | State Duma, 2016 18.09.2016 · Russian Federation |
| Osinin Nikolay Aleksandrovich b. 24.02.1957 · Registered · Self-nomination | Regional assembly, Mari El Republic, 2000 08.10.2000 · Mari El Republic |
| Osinina Olga Alekseevna b. 15.07.1978 · Registered · CPRF | Regional assembly, Nizhny Novgorod Oblast, 2006 12.03.2006 · Nizhny Novgorod Oblast |
| Osinkin Viktor Grigorevich b. 04.07.1964 · Registered · LDPR | State Duma, 2007 02.12.2007 · Russian Federation |
| Osinkin Viktor Grigorevich b. 04.07.1964 · Registered · LDPR | Regional assembly, Saratov Oblast, 2007 02.12.2007 · Saratov Oblast |
| Osinkin Viktor Grigorevich b. 04.07.1964 · Registered · LDPR | Regional assembly, Saratov Oblast, 2007 02.12.2007 · Saratov Oblast |
| Osinnaya Larisa Grigorevna b. 04.07.1956 · Registered · Self-nomination | Regional assembly, Khanty-Mansi Autonomous Okrug, 2001 14.01.2001 · Khanty-Mansi Autonomous Okrug |
| Osinovets Anatoliy Romanovich b. 01.01.1953 · Registered · A Just Russia | Regional assembly, Smolensk Oblast, 2007 02.12.2007 · Smolensk Oblast |
| Osintsev Ivan Petrovich b. 21.12.1954 · Registered · United Russia | Regional assembly, Udmurt Republic, 2012 14.10.2012 · Udmurt Republic |
| Osintsev Mikhail Vladimirovich b. 09.06.1976 · Registered · Voters’ group | Regional assembly, Tyumen Oblast, 2007 11.03.2007 · Tyumen Oblast |
| Osipenko Vladimir Vasilevich b. 04.05.1956 · Registered · A Just Russia | State Duma, 2007 02.12.2007 · Russian Federation |
| Osipenko Nikolay Mikhaylovich b. 18.09.1948 · Registered · Self-nomination | Regional assembly, Primorsky Krai, 2001 09.12.2001 · Primorsky Krai |
| Osipkov Viktor Yurevich b. 29.03.1971 · Registered · Yabloko | State Duma, 2011 04.12.2011 · Russian Federation |
| Osipov Aleksandr Viktorovich b. 06.08.1961 · Registered · Self-nomination | Regional assembly, Chelyabinsk Oblast, 2005 25.12.2005 · Chelyabinsk Oblast |
| Osipov Aleksandr Ivanovich b. 31.05.1955 · Registered · United Russia | Regional assembly, Lipetsk Oblast, 2011 04.12.2011 · Lipetsk Oblast |
| Osipov Aleksandr Nikolaevich b. 26.08.1953 · Registered · CPRF | Regional assembly, Saint Petersburg, 2007 11.03.2007 · Saint Petersburg |
| Osipov Aleksandr Pavlovich b. 22.11.1957 · Registered · Self-nomination | Regional assembly, Chuvash Republic, 2002 21.07.2002 · Chuvash Republic |
