| Kosenkova Elena Aleksandrovna b. 03.12.1941 · Registered · United Russia | Regional assembly, Pskov Oblast, 2011 04.12.2011 · Pskov Oblast |
| Kosenkova Elena Aleksandrovna b. 03.12.1941 · Registered · Voters’ group | Regional assembly, Pskov Oblast, 2002 31.03.2002 · Pskov Oblast |
| Kosets Olga Valentinovna b. 05.07.1971 · Registered · Civic Platform | State Duma, 2016 18.09.2016 · Russian Federation |
| Kosikova Nina Ivanovna b. 09.10.1943 · Registered · Patriots of Russia | Regional assembly, Udmurt Republic, 2012 14.10.2012 · Udmurt Republic |
| Kosilov Aleksandr Viktorovich b. 16.11.1982 · Registered · LDPR | Regional assembly, Orenburg Oblast, 2011 13.03.2011 · Orenburg Oblast |
| Kosilov Aleksandr Viktorovich b. 16.11.1982 · Registered · LDPR | Regional assembly, Orenburg Oblast, 2011 13.03.2011 · Orenburg Oblast |
| Kosilov Kirill Vladimirovich b. 07.07.1965 · Registered · Self-nomination | Regional assembly, Primorsky Krai, 2006 08.10.2006 · Primorsky Krai |
| Kosilov Kirill Vladimirovich b. 07.07.1965 · Registered · Yabloko | State Duma, 2007 02.12.2007 · Russian Federation |
| Kosilov Kirill Vladimirovich b. 07.07.1965 · Registered · Self-nomination | Regional assembly, Primorsky Krai, 2001 09.12.2001 · Primorsky Krai |
| Kosilova Larisa Anatolevna b. 21.01.1966 · Registered · Rodina | State Duma, 2021 19.09.2021 · Russian Federation |
| Kosinkov Evgeniy Vladimirovich b. 11.03.1972 · Registered · A Just Russia | Regional assembly, Tomsk Oblast, 2011 04.12.2011 · Tomsk Oblast |
| Kosinov Viktor Ivanovich b. 20.10.1953 · Registered · Patriots of Russia | Regional assembly, Republic of Dagestan, 2011 13.03.2011 · Republic of Dagestan |
| Kosinov Sergey Aleksandrovich b. 29.10.1960 · Registered · A Just Russia | State Duma, 2021 19.09.2021 · Russian Federation |
| Kosinov Sergey Aleksandrovich b. 29.10.1960 · Registered · A Just Russia | State Duma, 2016 18.09.2016 · Russian Federation |
| Kosinov Sergey Aleksandrovich b. 1960 · Registered · A Just Russia | Governor, Rostov Oblast, 2025 14.09.2025 · Rostov Oblast |
| Kosinskiy Petr Dmitrievich b. 10.09.1948 · Registered · A Just Russia | State Duma, 2007 02.12.2007 · Russian Federation |
| Kosintsev Aleksandr Petrovich b. 02.07.1957 · Registered · United Russia | Regional assembly, Sverdlovsk Oblast, 2010 14.03.2010 · Sverdlovsk Oblast |
| Kosintsev Aleksandr Petrovich b. 02.07.1957 · Registered · United Russia | Early · Regional assembly, Sverdlovsk Oblast, 2011 04.12.2011 · Sverdlovsk Oblast |
| Kosintseva Elena Algirdasovna b. 24.06.1970 · Registered · Party of Pensioners | Regional assembly, Kurgan Oblast, 2004 28.11.2004 · Kurgan Oblast |
| Kositsin Anatoliy Ivanovich b. 14.06.1938 · Registered · CPRF | Regional assembly, Astrakhan Oblast, 2011 04.12.2011 · Astrakhan Oblast |
| Kositsin Anatoliy Ivanovich b. 14.06.1938 · Registered · CPRF | Regional assembly, Astrakhan Oblast, 2006 08.10.2006 · Astrakhan Oblast |
| Kositsin Anatoliy Ivanovich b. 14.06.1938 · Registered · CPRF | Regional assembly, Astrakhan Oblast, 2006 08.10.2006 · Astrakhan Oblast |
| Kositsyn Nikolay Ivanovich b. 09.05.1949 · Registered · Communists of Russia | Regional assembly, Krasnodar Krai, 2012 14.10.2012 · Krasnodar Krai |
| Koskin Evgeniy Nikolaevich b. 07.05.1987 · Registered · LDPR | By-election · Regional assembly, Mari El Republic, 2023 23.04.2023 · Mari El Republic |
| Koskov Aleksandr Leonidovich b. 23.09.1964 · Registered · LDPR | Regional assembly, Perm Krai, 2006 03.12.2006 · Perm Krai |
| Koskov Oleg Alekseevich b. 1972 · Registered · The Greens | Regional assembly, Ryazan Oblast, 2025 14.09.2025 · Ryazan Oblast |
| Kosmachev Oleg Mikhaylovich b. 24.03.1971 · Registered · Voters’ group | State Duma, 2003 07.12.2003 · Russian Federation |
| Kosnov Igor Vyacheslavovich b. 04.07.1959 · Registered · United Russia | Regional assembly, Republic of Karelia, 2011 04.12.2011 · Republic of Karelia |
| Kosnyrev Valeriy Nikolaevich b. 1977 · Registered · LDPR | Regional assembly, Komi Republic, 2025 14.09.2025 · Komi Republic |
| Kosov Aleksandr Petrovich b. 05.09.1948 · Registered · CPRF | Regional assembly, Saratov Oblast, 2012 14.10.2012 · Saratov Oblast |
| Kosov Vladimir Nikolaevich b. 24.12.1948 · Registered · Patriots of Russia | State Duma, 2011 04.12.2011 · Russian Federation |
| Kosov Vladimir Nikolaevich b. 24.12.1948 · Registered · CPRF | Regional assembly, Tambov Oblast, 2001 16.12.2001 · Tambov Oblast |
| Kosov Vladimir Nikolaevich b. 24.12.1948 · Registered · Patriots of Russia | State Duma, 2007 02.12.2007 · Russian Federation |
| Kosov Ivan Sergeevich b. 2003 · Registered · The Greens | Regional assembly, Saint Petersburg, 2026 20.09.2026 · Saint Petersburg |
| Kosov Igor Viktorovich b. 1957 · Registered · CPRF | Regional assembly, Republic of Adygea, 2026 20.09.2026 · Republic of Adygea |
| Kosov Igor Viktorovich b. 1957 · Registered · CPRF | Regional assembly, Republic of Adygea, 2026 20.09.2026 · Republic of Adygea |
| Kosov Leonid Aleksandrovich b. 10.04.1946 · Registered · LDPR | Regional assembly, Altai Krai, 2008 02.03.2008 · Altai Krai |
| Kosovskikh Aleksandr Albertovich b. 11.05.1960 · Registered · Party of Growth | State Duma, 2016 18.09.2016 · Russian Federation |
| Kosovskikh Aleksandr Albertovich b. 11.05.1960 · Registered · A Just Russia | State Duma, 2007 02.12.2007 · Russian Federation |
| Kosovskikh Vera Borisovna b. 05.03.1955 · Registered · CPRF | Regional assembly, Kurgan Oblast, 2010 14.03.2010 · Kurgan Oblast |
| Kosogov Evgeniy Vladimirovich b. 29.04.1987 · Registered · United Russia | Regional assembly, Oryol Oblast, 2011 04.12.2011 · Oryol Oblast |
| Kosolapov Aleksandr Viktorovich b. 06.09.1971 · Registered · A Just Russia | Regional assembly, Amur Oblast, 2011 04.12.2011 · Amur Oblast |
| Kosolapov Aleksey Vladislavovich b. 28.10.1958 · Registered · Self-nomination | Regional assembly, Republic of Bashkortostan, 2000 24.09.2000 · Republic of Bashkortostan |
| Kosolapov Andrey Anatolevich b. 07.09.1974 · Registered · Patriots of Russia | Regional assembly, Udmurt Republic, 2012 14.10.2012 · Udmurt Republic |
| Kosolapov Boris Ivanovich b. 04.05.1936 · Registered · A Just Russia | Regional assembly, Saratov Oblast, 2012 14.10.2012 · Saratov Oblast |
| Kosolapov Dmitriy Dmitrievich b. 07.07.1961 · Registered · A Just Russia | Regional assembly, Murmansk Oblast, 2007 11.03.2007 · Murmansk Oblast |
| Kosolapov Nikolay Aleksandrovich b. 04.01.1939 · Registered · Politicheskaya partiya "Liberalno-demokraticheskaya partiya Rossiyskoy Federatsii" | Regional assembly, Republic of Bashkortostan, 2008 02.03.2008 · Republic of Bashkortostan |
| Kosolapov Oleg Veniaminovich b. 15.07.1958 · Registered · Self-nomination | Regional assembly, Orenburg Oblast, 2002 30.06.2002 · Orenburg Oblast |
| Kosolapov Oleg Veniaminovich b. 15.07.1958 · Registered · Self-nomination | Regional assembly, Orenburg Oblast, 2002 24.03.2002 · Orenburg Oblast |
| Kosolapova Vera Ivanovna b. 19.05.1969 · Registered · LDPR | Regional assembly, Republic of Mordovia, 2007 02.12.2007 · Republic of Mordovia |
