| Kosintsev Aleksandr Petrovich b. 02.07.1957 · Elected deputy · United Russia | Regional assembly, Sverdlovsk Oblast, 2008 02.03.2008 · Sverdlovsk Oblast |
| Kosmachev Vyacheslav Vladimirovich b. 07.08.1967 · Elected deputy · United Russia | Regional assembly, Penza Oblast, 2012 14.10.2012 · Penza Oblast |
| Kosmylina Luiza Garifovna b. 05.09.1937 · Elected deputy · United Russia | Regional assembly, Republic of Tatarstan, 2004 14.03.2004 · Republic of Tatarstan |
| Kosov Vladimir Alekseevich b. 03.08.1946 · Elected deputy · United Russia | Regional assembly, Komi Republic, 2007 11.03.2007 · Komi Republic |
| Kosov Vladimir Alekseevich b. 03.08.1946 · Elected deputy · Self-nomination | Regional assembly, Komi Republic, 2003 02.03.2003 · Komi Republic |
| Kosov Vladimir Alekseevich b. 1946 · Elected · United Russia | Regional assembly, Komi Republic, 2025 14.09.2025 · Komi Republic |
| Kosov Vladimir Alekseevich b. 03.08.1946 · Elected deputy · United Russia | Regional assembly, Komi Republic, 2011 13.03.2011 · Komi Republic |
| Kosovskikh Aleksandr Albertovich b. 11.05.1960 · Elected deputy · Self-nomination | Regional assembly, Nizhny Novgorod Oblast, 2002 31.03.2002 · Nizhny Novgorod Oblast |
| Kosovskikh Aleksandr Albertovich b. 11.05.1960 · Elected deputy · A Just Russia | Regional assembly, Nizhny Novgorod Oblast, 2011 13.03.2011 · Nizhny Novgorod Oblast |
| Kosovskikh Aleksandr Albertovich b. 11.05.1960 · Elected deputy · Party of Pensioners | Regional assembly, Nizhny Novgorod Oblast, 2006 12.03.2006 · Nizhny Novgorod Oblast |
| Kosolapov Vladimir Mikhaylovich b. 03.06.1957 · Elected deputy · United Russia | Regional assembly, Kirov Oblast, 2006 12.03.2006 · Kirov Oblast |
| Kosolapov Gennadiy Ivanovich b. 21.11.1955 · Elected deputy · United Russia | Regional assembly, Chuvash Republic, 2006 08.10.2006 · Chuvash Republic |
| Kostenetskaya Elena Egorovna b. 1976 · Elected · United Russia | Regional assembly, Komi Republic, 2025 14.09.2025 · Komi Republic |
| Kostenko Aleksandr Ivanovich b. 24.10.1958 · Elected deputy · United Russia | Regional assembly, Primorsky Krai, 2011 04.12.2011 · Primorsky Krai |
| Kostenko Natalya Ivanovna b. 05.10.1972 · Elected deputy · CPRF | Regional assembly, Kurgan Oblast, 2010 14.03.2010 · Kurgan Oblast |
| Kostenkov Evgeniy Vitalevich b. 11.10.1964 · Elected deputy · United Russia | Regional assembly, Udmurt Republic, 2007 02.12.2007 · Udmurt Republic |
| Kostenyuk Aleksandr Grigorevich b. 18.12.1935 · Elected deputy · Self-nomination | Regional assembly, Orenburg Oblast, 2002 24.03.2002 · Orenburg Oblast |
| Kosterev Anatoliy Evgenevich b. 16.02.1957 · Elected deputy · A Just Russia | Regional assembly, Saint Petersburg, 2007 11.03.2007 · Saint Petersburg |
| Kostik Irina Anatolevna b. 18.08.1962 · Elected deputy · United Russia | By-election · Regional assembly, Kemerovo Oblast – Kuzbass, 2010 14.03.2010 · Kemerovo Oblast – Kuzbass |
| Kostin Aleksandr Nikolaevich b. 03.11.1957 · Elected deputy · "Bryanskoe oblastnoe otdelenie Kommunisticheskoy partii Rossiyskoy Federatsii" | Regional assembly, Bryansk Oblast, 2009 01.03.2009 · Bryansk Oblast |
| Kostin Anatoliy Arkadevich b. 20.08.1947 · Elected deputy · Self-nomination | Regional assembly, Arkhangelsk Oblast, 2000 03.12.2000 · Arkhangelsk Oblast |
| Kostin Yuriy Alekseevich b. 15.03.1971 · Elected deputy · United Russia | By-election · Regional assembly, Lipetsk Oblast, 2019 14.04.2019 · Lipetsk Oblast |
| Kostina Marina Vasilevna b. 08.01.1969 · Elected deputy · CPRF | Regional assembly, Kaluga Oblast, 2010 14.03.2010 · Kaluga Oblast |
| Kostina Marina Vasilevna b. 08.01.1969 · Elected deputy · CPRF | Regional assembly, Kaluga Oblast, 2004 14.11.2004 · Kaluga Oblast |
| Kostina Rimma Vasilevna b. 19.08.1934 · Elected deputy · United Russia | Regional assembly, Nenets Autonomous Okrug, 2009 01.03.2009 · Nenets Autonomous Okrug |
| Kostoev Ruslan Khasanovich b. 27.04.1970 · Elected deputy · United Russia | Regional assembly, Republic of Ingushetia, 2011 04.12.2011 · Republic of Ingushetia |
| Kostoev Yusup Bashirovich b. 26.06.1963 · Elected deputy · United Russia | Regional assembly, Republic of Ingushetia, 2008 02.03.2008 · Republic of Ingushetia |
| Kostrikin Vladimir Viktorovich b. 02.12.1958 · Elected deputy · United Russia | Regional assembly, Kursk Oblast, 2011 13.03.2011 · Kursk Oblast |
| Kostrikin Vladimir Viktorovich b. 02.12.1958 · Elected deputy · United Russia | Regional assembly, Kursk Oblast, 2006 12.03.2006 · Kursk Oblast |
| Kostrin Valentin Ivanovich b. 24.02.1945 · Elected deputy · CPRF | Regional assembly, Republic of Tatarstan, 2009 01.03.2009 · Republic of Tatarstan |
| Kostritsa Vasiliy Maksimovich b. 18.05.1964 · Elected deputy · United Russia | Regional assembly, Leningrad Oblast, 2011 04.12.2011 · Leningrad Oblast |
| Kostritsa Leonid Efimovich b. 26.01.1939 · Elected deputy · United Russia | Regional assembly, Pskov Oblast, 2007 11.03.2007 · Pskov Oblast |
| Kostromin Nikolay Nikolaevich b. 10.03.1956 · Elected deputy · United Russia | Regional assembly, Sakha Republic (Yakutia), 2008 02.03.2008 · Sakha Republic (Yakutia) |
| Kostunov Ilya Evgenevich b. 03.11.1980 · Elected deputy · United Russia | State Duma, 2011 04.12.2011 · Russian Federation |
| Kostylev Sergey Vladimirovich b. 1976 · Elected · United Russia | Regional assembly, Chelyabinsk Oblast, 2025 14.09.2025 · Chelyabinsk Oblast |
| Kostyuk Mariya Fedorovna b. 1977 · Elected · United Russia | Governor, Jewish Autonomous Oblast, 2025 14.09.2025 · Jewish Autonomous Oblast |
| Kostyukhin Aleksandr Alekseevich b. 10.10.1958 · Elected deputy · Self-nomination | Regional assembly, Novgorod Oblast, 2001 21.10.2001 · Novgorod Oblast |
| Kostyush Vladimir Fedorovich b. 01.04.1958 · Elected deputy · United Russia | Regional assembly, Republic of Khakassia, 2009 01.03.2009 · Republic of Khakassia |
| Kostyush Vladimir Fedorovich b. 01.04.1958 · Elected deputy · Voters’ group | Regional assembly, Republic of Khakassia, 2004 26.12.2004 · Republic of Khakassia |
| Kosyanenko Evgeniy Viktorovich b. 29.08.1963 · Elected deputy · United Russia | Regional assembly, Kemerovo Oblast – Kuzbass, 2008 12.10.2008 · Kemerovo Oblast – Kuzbass |
| Kotelkin Dmitriy Valerevich b. 18.08.1969 · Elected deputy · United Russia | Regional assembly, Amur Oblast, 2005 27.03.2005 · Amur Oblast |
| Kotelnikov Viktor Pavlovich b. 23.01.1943 · Elected deputy · Voters’ group | Regional assembly, Republic of Khakassia, 2004 26.12.2004 · Republic of Khakassia |
| Kotelnikov Gennadiy Petrovich b. 11.01.1949 · Elected deputy · United Russia | Regional assembly, Samara Oblast, 2011 04.12.2011 · Samara Oblast |
| Kotelnikov Nikolay Stefanovich b. 30.01.1955 · Elected deputy · Self-nomination | Regional assembly, Voronezh Oblast, 2005 20.03.2005 · Voronezh Oblast |
| Kotenev Valeriy Nikolaevich b. 05.09.1953 · Elected deputy · Self-nomination | Regional assembly, Sakha Republic (Yakutia), 2002 29.12.2002 · Sakha Republic (Yakutia) |
| Kotenko Konstantin Valentinovich b. 22.01.1967 · Elected deputy · Self-nomination | By-election · Regional assembly, Stavropol Krai, 2005 06.02.2005 · Stavropol Krai |
| Kotik Lyudmila Ivanovna b. 28.10.1949 · Elected deputy · United Russia | Regional assembly, Tula Oblast, 2009 11.10.2009 · Tula Oblast |
| Kotik Lyudmila Ivanovna b. 28.10.1949 · Elected deputy · Voters’ group | Regional assembly, Tula Oblast, 2004 03.10.2004 · Tula Oblast |
| Kotikov Viktor Iosifovich b. 12.03.1946 · Elected deputy · Self-nomination | Regional assembly, Mari El Republic, 2000 08.10.2000 · Mari El Republic |
| Kotkin Sergey Nikolaevich b. 11.03.1956 · Elected deputy · United Russia | Regional assembly, Nenets Autonomous Okrug, 2005 06.02.2005 · Nenets Autonomous Okrug |
