| Ostapenko Valentina Sergeevna b. 20.12.1959 · Registered · Self-nomination | Regional assembly, Primorsky Krai, 2006 08.10.2006 · Primorsky Krai |
| Ostapenko Evgeniy Dmitrievich b. 12.01.1951 · Registered · Self-nomination | Governor, Khanty-Mansi Autonomous Okrug, 2000 26.03.2000 · Khanty-Mansi Autonomous Okrug |
| Ostapenko Elena Valerevna b. 09.12.1976 · Registered · CPRF | Regional assembly, Chelyabinsk Oblast, 2010 10.10.2010 · Chelyabinsk Oblast |
| Ostapenko Marina Vladimirovna b. 10.10.1959 · Registered · Yabloko | Regional assembly, Pskov Oblast, 2011 04.12.2011 · Pskov Oblast |
| Ostapenko Tatyana Nikolaevna b. 25.04.1953 · Registered · Right Cause | Regional assembly, Sakhalin Oblast, 2012 14.10.2012 · Sakhalin Oblast |
| Ostapets Aleksey Nikolaevich b. 03.03.1948 · Registered · CPRF | Regional assembly, Khabarovsk Krai, 2010 14.03.2010 · Khabarovsk Krai |
| Ostapets Aleksey Nikolaevich b. 03.03.1948 · Registered · CPRF | Regional assembly, Khabarovsk Krai, 2005 11.12.2005 · Khabarovsk Krai |
| Ostapets Aleksey Nikolaevich b. 03.03.1948 · Registered · CPRF | Regional assembly, Khabarovsk Krai, 2010 14.03.2010 · Khabarovsk Krai |
| Ostapiv Roman Mikhaylovich b. 28.03.1976 · Registered · LDPR | Regional assembly, Samara Oblast, 2007 11.03.2007 · Samara Oblast |
| Ostapova Alla Viktorovna b. 14.04.1952 · Registered · Samovydvizhenie | Regional assembly, Kamchatka Krai, 2007 02.12.2007 · Kamchatka Krai |
| Ostapchenko Petr Nikolaevich b. 23.05.1951 · Registered · United Russia | Regional assembly, Altai Krai, 2011 04.12.2011 · Altai Krai |
| Ostapchuk Nadezhda Alekseevna b. 26.03.1965 · Registered · A Just Russia | Regional assembly, Karachay-Cherkess Republic, 2009 01.03.2009 · Karachay-Cherkess Republic |
| Ostasevich Vladimir Aleksandrovich b. 17.11.1957 · Registered · Self-nomination | Regional assembly, Kirov Oblast, 2001 25.03.2001 · Kirov Oblast |
| Ostashenkov Pavel Ivanovich b. 20.06.1966 · Registered · Self-nomination | Regional assembly, Mari El Republic, 2000 08.10.2000 · Mari El Republic |
| Ostashenkova Natalya Tarasovna b. 29.05.1971 · Registered · LDPR | By-election · Regional assembly, Republic of Khakassia, 2010 14.03.2010 · Republic of Khakassia |
| Osterova Liliya Valerevna b. 12.08.1974 · Registered · CPRF | Regional assembly, Chuvash Republic, 2006 08.10.2006 · Chuvash Republic |
| Ostrenkov Leonid Georgievich b. 12.08.1938 · Registered · Voters’ group | Regional assembly, Tver Oblast, 2005 18.12.2005 · Tver Oblast |
| Ostrikov Aleksandr Valentinovich b. 20.12.1957 · Registered · Patriots of Russia | Early · Governor, Kamchatka Krai, 2015 13.09.2015 · Kamchatka Krai |
| Ostrikov Aleksandr Valentinovich b. 20.12.1957 · Registered · Patriots of Russia | State Duma, 2007 02.12.2007 · Russian Federation |
| Ostrikov Aleksandr Valentinovich b. 20.12.1957 · Registered · Patriots of Russia | Early · Governor, Kamchatka Krai, 2020 13.09.2020 · Kamchatka Krai |
| Ostrikov Aleksandr Valentinovich b. 20.12.1957 · Registered · Patriots of Russia | Regional assembly, Kamchatka Krai, 2011 04.12.2011 · Kamchatka Krai |
| Ostrikov Aleksandr Valentinovich b. 20.12.1957 · Registered · Patriots of Russia | State Duma, 2011 04.12.2011 · Russian Federation |
| Ostrikov Vladimir Ivanovich b. 12.05.1955 · Registered · LDPR | Regional assembly, Rostov Oblast, 2008 02.03.2008 · Rostov Oblast |
| Ostrovskaya Valentina Ivanovna b. 29.02.1944 · Registered · CPRF | Regional assembly, Krasnoyarsk Krai, 2007 15.04.2007 · Krasnoyarsk Krai |
| Ostrovskaya Valentina Ivanovna b. 29.02.1944 · Registered · A Just Russia | Regional assembly, Krasnoyarsk Krai, 2011 04.12.2011 · Krasnoyarsk Krai |
| Ostrovskiy Aleksandr Nikolaevich b. 08.11.1943 · Registered · Self-nomination | Regional assembly, Mari El Republic, 2000 03.12.2000 · Mari El Republic |
| Ostrovskiy Aleksandr Nikolaevich b. 08.11.1943 · Registered · Self-nomination | Regional assembly, Mari El Republic, 2000 08.10.2000 · Mari El Republic |
| Ostrovskiy Anatoliy Bentsianovich b. 18.02.1940 · Registered · United Russia | Regional assembly, Khabarovsk Krai, 2005 11.12.2005 · Khabarovsk Krai |
| Ostrovskiy Valeriy Vladimirovich b. 12.07.1967 · Registered · Self-nomination | Regional assembly, Saratov Oblast, 2004 14.03.2004 · Saratov Oblast |
| Ostrovskiy Valeriy Petrovich b. 30.01.1947 · Registered · Yabloko | Regional assembly, Saint Petersburg, 2002 08.12.2002 · Saint Petersburg |
| Ostrovskiy Pavel Anatolevich b. 16.04.1967 · Registered · Self-nomination | Regional assembly, Primorsky Krai, 2001 09.12.2001 · Primorsky Krai |
| Ostrovskiy Stanislav Markovich b. 01.01.1947 · Registered · CPRF | Regional assembly, Republic of Dagestan, 2007 11.03.2007 · Republic of Dagestan |
| Ostroglazov Anatoliy Vladimirovich b. 07.09.1945 · Registered · CPRF | Regional assembly, Komi Republic, 2011 13.03.2011 · Komi Republic |
| Ostrodumov Nikolay Anatolevich b. 03.10.1977 · Registered · A Just Russia | Governor, Nenets Autonomous Okrug, 2014 14.09.2014 · Nenets Autonomous Okrug |
| Ostropovich Natalya Vladimirovna b. 1960 · Registered · Party of Pensioners | By-election · Regional assembly, Tula Oblast, 2026 20.09.2026 · Tula Oblast |
| Ostroumov Dmitriy Yurevich b. 20.11.1975 · Registered · Rodina | Regional assembly, Sverdlovsk Oblast, 2004 14.03.2004 · Sverdlovsk Oblast |
| Ostroumova Elena Anatolevna b. 21.07.1983 · Registered · Civic Force | State Duma, 2007 02.12.2007 · Russian Federation |
| Ostroukhov Andrey Vladimirovich b. 13.12.1974 · Registered · A Just Russia | Regional assembly, Kaliningrad Oblast, 2011 13.03.2011 · Kaliningrad Oblast |
| Ostroukhov Gennadiy Ivanovich b. 28.01.1960 · Registered · Patriots of Russia | Regional assembly, Orenburg Oblast, 2011 13.03.2011 · Orenburg Oblast |
| Ostroukhov Gennadiy Ivanovich b. 28.01.1960 · Registered · Patriots of Russia | Regional assembly, Orenburg Oblast, 2011 13.03.2011 · Orenburg Oblast |
| Ostroukhov Gennadiy Ivanovich b. 28.01.1960 · Registered · Patriots of Russia | State Duma, 2011 04.12.2011 · Russian Federation |
| Ostroukhova Polina Sergeevna b. 1999 · Registered · United Russia | Regional assembly, Magadan Oblast, 2025 14.09.2025 · Magadan Oblast |
| Ostroushko Vasiliy Vasilevich b. 27.03.1961 · Registered · A Just Russia | Regional assembly, Novosibirsk Oblast, 2010 10.10.2010 · Novosibirsk Oblast |
| Ostroushko Tatyana Ivanovna b. 04.12.1954 · Registered · Self-nomination | Regional assembly, Yaroslavl Oblast, 2000 26.03.2000 · Yaroslavl Oblast |
| Oskin Aleksandr Grigorevich b. 01.12.1963 · Registered · CPRF | Regional assembly, Republic of Buryatia, 2007 02.12.2007 · Republic of Buryatia |
| Oskin Vasiliy Fedorovich b. 15.09.1948 · Registered · CPRF | Regional assembly, Samara Oblast, 2007 11.03.2007 · Samara Oblast |
| Oskin Viktor Fedorovich b. 12.02.1952 · Registered · CPRF | Repeat · Regional assembly, Ulyanovsk Oblast, 2004 14.03.2004 · Ulyanovsk Oblast |
| Oskin Vladimir Sergeevich b. 08.04.1958 · Registered · Politicheskaya partiya «Partiya sotsialnoy spravedlivosti» | State Duma, 2007 02.12.2007 · Russian Federation |
| Oskin Sergey Vladimirovich b. 27.05.1975 · Registered · CPRF | Regional assembly, Republic of Mordovia, 2011 04.12.2011 · Republic of Mordovia |
| Oskina Vera Egorovna b. 23.03.1955 · Registered · United Russia | State Duma, 2007 02.12.2007 · Russian Federation |
