| Kostylev Lev Nikolaevich b. 23.08.1951 · Registered · Patriots of Russia | Regional assembly, Krasnodar Krai, 2012 14.10.2012 · Krasnodar Krai |
| Kostylev Lev Nikolaevich b. 23.08.1951 · Registered · Patriots of Russia | State Duma, 2007 02.12.2007 · Russian Federation |
| Kostylev Nikolay Ivanovich b. 25.06.1939 · Registered · CPRF | Regional assembly, Altai Krai, 2011 04.12.2011 · Altai Krai |
| Kostylev Yuriy Georgievich b. 12.08.1954 · Registered · Self-nomination | Regional assembly, Tyumen Oblast, 2007 11.03.2007 · Tyumen Oblast |
| Kostyleva Natalya Aleksandrovna b. 17.12.1974 · Registered · A Just Russia | Regional assembly, Sakhalin Oblast, 2012 14.10.2012 · Sakhalin Oblast |
| Kostyrenko Andrey Fedorovich b. 07.06.1971 · Registered · "Kamchatskoe kraevoe otdelenie Kommunisticheskoy partii Rossiyskoy Federatsii" | Regional assembly, Kamchatka Krai, 2007 02.12.2007 · Kamchatka Krai |
| Kostyrko Viktor Ivanovich b. 1948 · Registered · Party of Pensioners | Regional assembly, Omsk Oblast, 2026 20.09.2026 · Omsk Oblast |
| Kostychakov Vladimir Fedorovich b. 1967 · Registered · Communists of Russia | Regional assembly, Ryazan Oblast, 2025 14.09.2025 · Ryazan Oblast |
| Kostycheva Marina Aleksandrovna b. 09.12.1989 · Registered · Rodina | State Duma, 2021 19.09.2021 · Russian Federation |
| Kost Tatyana Yurevna b. 13.11.1969 · Registered · United Russia | Regional assembly, Pskov Oblast, 2007 11.03.2007 · Pskov Oblast |
| Kostkova Olga Vladimirovna b. 18.06.1977 · Registered · LDPR | Regional assembly, Saratov Oblast, 2012 14.10.2012 · Saratov Oblast |
| Kostyuk Aleksandr Nikolaevich b. 1993 · Registered · Yabloko | Regional assembly, Pskov Oblast, 2026 20.09.2026 · Pskov Oblast |
| Kostyuk Lidiya Ivanovna b. 12.08.1938 · Registered · United Russia | Regional assembly, Republic of Karelia, 2011 04.12.2011 · Republic of Karelia |
| Kostyuk Natalya Evgenevna b. 14.12.1961 · Registered · Voters’ group | Regional assembly, Republic of Adygea, 2006 12.03.2006 · Republic of Adygea |
| Kostyuk Sergey Valerevich b. 21.07.1984 · Registered · A Just Russia | Regional assembly, Novosibirsk Oblast, 2010 10.10.2010 · Novosibirsk Oblast |
| Kostyuk Tatyana Vladimirovna b. 07.09.1957 · Registered · LDPR | Regional assembly, Amur Oblast, 2005 27.03.2005 · Amur Oblast |
| Kostyukov Aleksandr Nikolaevich b. 20.09.1958 · Registered · Self-nomination | Regional assembly, Omsk Oblast, 2007 11.03.2007 · Omsk Oblast |
| Kostyukov Aleksandr Nikolaevich b. 20.09.1958 · Registered · Voters’ group | State Duma, 2003 07.12.2003 · Russian Federation |
| Kostyukov Aleksandr Nikolaevich b. 20.09.1958 · Registered · A Just Russia | State Duma, 2007 02.12.2007 · Russian Federation |
| Kostyukov Aleksey Viktorovich b. 24.09.1967 · Registered · United Russia | Regional assembly, Novgorod Oblast, 2006 08.10.2006 · Novgorod Oblast |
| Kostyukov Aleksey Viktorovich b. 24.09.1967 · Registered · United Russia | Regional assembly, Novgorod Oblast, 2006 08.10.2006 · Novgorod Oblast |
| Kostyukov Andrey Valerevich b. 1983 · Registered · CPRF | Regional assembly, Belgorod Oblast, 2025 14.09.2025 · Belgorod Oblast |
| Kostyukov Vadim Yurevich b. 15.02.1990 · Registered · LDPR | Regional assembly, Omsk Oblast, 2011 04.12.2011 · Omsk Oblast |
| Kostyukov Nikolay Igorevich b. 06.02.1985 · Registered · Civic Force | State Duma, 2016 18.09.2016 · Russian Federation |
| Kostyukov Nikolay Nikolaevich b. 31.10.1966 · Registered · Samovydvizhenie | Regional assembly, Altai Krai, 2008 02.03.2008 · Altai Krai |
| Kostyukov Yuriy Valerevich b. 1992 · Registered · CPRF | Regional assembly, Belgorod Oblast, 2025 14.09.2025 · Belgorod Oblast |
| Kostyukova Elena Sergeevna b. 05.05.1987 · Registered · United Russia | Regional assembly, Mari El Republic, 2009 11.10.2009 · Mari El Republic |
| Kostyuminskiy Stepan Yurevich b. 13.06.1965 · Registered · Civic Force | State Duma, 2007 02.12.2007 · Russian Federation |
| Kostyunin Anatoliy Aleksandrovich b. 15.05.1987 · Registered · A Just Russia | Regional assembly, Moscow Oblast, 2011 04.12.2011 · Moscow Oblast |
| Kostyunin Sergey Vladimirovich b. 23.10.1982 · Registered · Self-nomination | Regional assembly, Leningrad Oblast, 2007 11.03.2007 · Leningrad Oblast |
| Kostyukhin Aleksandr Alekseevich b. 10.10.1958 · Registered · A Just Russia | State Duma, 2007 02.12.2007 · Russian Federation |
| Kostyukhin Aleksandr Alekseevich b. 10.10.1958 · Registered · Voters’ group | Regional assembly, Novgorod Oblast, 2006 08.10.2006 · Novgorod Oblast |
| Kostyukhin Oleg Sergeevich b. 13.03.1957 · Registered · Civic Force | State Duma, 2007 02.12.2007 · Russian Federation |
| Kostyukhina Lyudmila Ivanovna b. 28.10.1954 · Registered · United Russia | Regional assembly, Lipetsk Oblast, 2006 08.10.2006 · Lipetsk Oblast |
| Kostyukhina Marina Mikhaylovna b. 09.09.1963 · Registered · Patriots of Russia | Regional assembly, Novgorod Oblast, 2006 08.10.2006 · Novgorod Oblast |
| Kostyukhina Marina Mikhaylovna b. 09.09.1963 · Registered · Patriots of Russia | Regional assembly, Novgorod Oblast, 2006 08.10.2006 · Novgorod Oblast |
| Kostyukhina Marina Mikhaylovna b. 09.09.1963 · Registered · Samovydvizhenie | Regional assembly, Novgorod Oblast, 2011 04.12.2011 · Novgorod Oblast |
| Kostyuchenko Nina Vladimirovna b. 31.08.1955 · Registered · Voters’ group | Regional assembly, Astrakhan Oblast, 2006 08.10.2006 · Astrakhan Oblast |
| Kostyush Vladimir Fedorovich b. 01.04.1958 · Registered · Voters’ group | Regional assembly, Republic of Khakassia, 2004 26.12.2004 · Republic of Khakassia |
| Kostyushov Evgeniy Vasilevich b. 12.10.1948 · Registered · United Russia | State Duma, 2011 04.12.2011 · Russian Federation |
| Kostyakov Aleksey Vladimirovich b. 13.11.1982 · Registered · United Russia | Regional assembly, Leningrad Oblast, 2007 11.03.2007 · Leningrad Oblast |
| Kostyanetskiy Yuriy Viktorovich b. 18.04.1955 · Registered · United Russia | Regional assembly, Republic of Karelia, 2006 08.10.2006 · Republic of Karelia |
| Kostyashov Vadim Valentinovich b. 10.10.1949 · Registered · CPRF | Regional assembly, Vologda Oblast, 2011 04.12.2011 · Vologda Oblast |
| Kosulin Aleksandr Nikolaevich b. 04.08.1974 · Registered · United Russia | Regional assembly, Kirov Oblast, 2011 13.03.2011 · Kirov Oblast |
| Kosumova Khedi Gazalievna b. 22.03.1966 · Registered · Self-nomination | Regional assembly, Chechen Republic, 2005 27.11.2005 · Chechen Republic |
| Kosushkin Yuriy Vasilevich b. 14.06.1972 · Registered · Samovydvizhenie | Regional assembly, Moscow Oblast, 2011 04.12.2011 · Moscow Oblast |
| Kosygin Andrey Borisovich b. 25.04.1957 · Registered · United Russia | Regional assembly, Moscow Oblast, 2011 04.12.2011 · Moscow Oblast |
| Kosygin Dmitriy Viktorovich b. 05.05.1970 · Registered · LDPR | Regional assembly, Chelyabinsk Oblast, 2005 25.12.2005 · Chelyabinsk Oblast |
| Kosygin Dmitriy Viktorovich b. 05.05.1970 · Registered · LDPR | Regional assembly, Chelyabinsk Oblast, 2010 10.10.2010 · Chelyabinsk Oblast |
| Kosykh Aleksandr Igorevich b. 15.07.1971 · Registered · LDPR | By-election · Regional assembly, Rostov Oblast, 2012 04.03.2012 · Rostov Oblast |
