| Kostyaeva Yuliya Dmitrievna b. 11.01.1998 · Nominated · New People | Regional assembly, Altai Krai, 2021 19.09.2021 · Altai Krai |
| Kostyaeva Yuliya Dmitrievna b. 11.01.1998 · Nominated · New People | Regional assembly, Oryol Oblast, 2021 19.09.2021 · Oryol Oblast |
| Kostyaeva Yuliya Dmitrievna b. 11.01.1998 · Nominated · New People | Regional assembly, Kaliningrad Oblast, 2021 19.09.2021 · Kaliningrad Oblast |
| Kostyaeva Yuliya Dmitrievna b. 11.01.1998 · Nominated · New People | Regional assembly, Saratov Oblast, 2022 11.09.2022 · Saratov Oblast |
| Kostyaeva Yuliya Dmitrievna b. 11.01.1998 · Nominated · New People | Regional assembly, Penza Oblast, 2022 11.09.2022 · Penza Oblast |
| Kostyaeva Yuliya Dmitrievna b. 11.01.1998 · Nominated · New People | Regional assembly, Belgorod Oblast, 2020 13.09.2020 · Belgorod Oblast |
| 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 |
| Kosukhin Sergey Aleksandrovich b. 25.08.1976 · Nominated · CPRF | Regional assembly, Republic of Bashkortostan, 2018 09.09.2018 · Republic of Bashkortostan |
| Kosygin Andrey Borisovich b. 25.04.1957 · Nominated · United Russia | Regional assembly, Moscow Oblast, 2016 18.09.2016 · Moscow Oblast |
| Kosygin Dmitriy Viktorovich b. 05.05.1970 · Registered · LDPR | Regional assembly, Chelyabinsk Oblast, 2005 25.12.2005 · Chelyabinsk Oblast |
| Kosygin Maksim Ivanovich b. 04.01.1983 · Nominated · LDPR | Regional assembly, Irkutsk Oblast, 2018 09.09.2018 · Irkutsk Oblast |
| Kosymkin Aleksandr Yurevich b. 02.03.1994 · Nominated · A Just Russia | Regional assembly, Ulyanovsk Oblast, 2023 10.09.2023 · Ulyanovsk Oblast |
| Kosyreva Lidiya Danilovna b. 27.07.1939 · Nominated · CPRF | Regional assembly, Khabarovsk Krai, 2014 14.09.2014 · Khabarovsk Krai |
| Kosyreva Natalya Vladimirovna b. 05.08.1970 · Nominated · United Russia | Regional assembly, Saratov Oblast, 2022 11.09.2022 · Saratov Oblast |
| Kosykh Aleksandr Igorevich b. 15.07.1971 · Nominated · LDPR | Regional assembly, Rostov Oblast, 2013 08.09.2013 · Rostov Oblast |
| Kosykh Aleksandr Igorevich b. 15.07.1971 · Nominated · LDPR | Regional assembly, Rostov Oblast, 2013 08.09.2013 · Rostov Oblast |
| Kosykh Artem Dmitrievich b. 11.09.1986 · Nominated · LDPR | Regional assembly, Kaluga Oblast, 2020 13.09.2020 · Kaluga Oblast |
| Kosykh Vadim Vyacheslavovich b. 06.02.1970 · Nominated · Civic Platform | Regional assembly, Smolensk Oblast, 2013 08.09.2013 · Smolensk Oblast |
| Kosykh Vadim Vyacheslavovich b. 06.02.1970 · Nominated · United Russia | Regional assembly, Smolensk Oblast, 2018 09.09.2018 · Smolensk Oblast |
| Kosykh Vitaliy Sergeevich b. 18.06.1991 · Nominated · Rodina | Regional assembly, Tambov Oblast, 2021 19.09.2021 · Tambov Oblast |
| Kosykh Denis Vladimirovich b. 26.10.1984 · Nominated · United Russia | Regional assembly, Krasnodar Krai, 2017 10.09.2017 · Krasnodar Krai |
| Kosykh Mikhail Fedorovich year of birth not listed · CPRF | State Duma, 2003 07.12.2003 · Russian Federation |
| Koskevich Aleksandr Maryanovich b. 22.08.1970 · Nominated · Rodina | Regional assembly, Irkutsk Oblast, 2018 09.09.2018 · Irkutsk Oblast |
| Koskov Egor Sergeevich b. 23.07.1990 · Nominated · LDPR | Regional assembly, Luhansk People’s Republic, 2023 10.09.2023 · Luhansk People’s Republic |
| Koskov Egor Sergeevich b. 1990 · Nominated · LDPR | State Duma, 2026 20.09.2026 · Russian Federation |
| Koskova Elena Kuzminichna b. 04.09.1949 · Nominated · Party of Pensioners | Regional assembly, Vologda Oblast, 2021 19.09.2021 · Vologda Oblast |
| Kosyan Denis Sergeevich b. 22.09.1976 · Nominated · United Russia | Regional assembly, Zabaykalsky Krai, 2018 09.09.2018 · Zabaykalsky Krai |
| Kosyan Denis Sergeevich b. 22.09.1976 · Nominated · United Russia | Regional assembly, Zabaykalsky Krai, 2023 10.09.2023 · Zabaykalsky Krai |
| Kosyanenko Vladimir Leonidovich b. 15.05.1967 · Nominated · United Russia | Regional assembly, Primorsky Krai, 2016 18.09.2016 · Primorsky Krai |
| Kosyanenko Tatyana Sergeevna b. 02.11.1954 · Nominated · United Russia | Regional assembly, Primorsky Krai, 2021 19.09.2021 · Primorsky Krai |
| Kosyanenko Tatyana Sergeevna b. 02.11.1954 · Nominated · United Russia | Regional assembly, Primorsky Krai, 2016 18.09.2016 · Primorsky Krai |
| Kosyuk Larisa Konstantinovna b. 30.03.1963 · Nominated · The Greens | Regional assembly, Moscow Oblast, 2021 19.09.2021 · Moscow Oblast |
| Kosyuk Larisa Konstantinovna b. 30.03.1963 · Nominated · The Greens | Regional assembly, Moscow, 2024 08.09.2024 · Moscow |
| Kosyuk Larisa Konstantinovna b. 30.03.1963 · Nominated · The Greens | Regional assembly, Moscow Oblast, 2021 19.09.2021 · Moscow Oblast |
| Kosyak Aleksey Pavlovich b. 10.03.1947 · Nominated · CPRF | Regional assembly, Primorsky Krai, 2016 18.09.2016 · Primorsky Krai |
| Kosyakov Aleksandr Aleksandrovich b. 07.12.1960 · Registered · Patriots of Russia | Regional assembly, Perm Krai, 2006 03.12.2006 · Perm Krai |
| Kosyakov Aleksandr Vladislavovich b. 2001 · Registered · A Just Russia | Regional assembly, Ryazan Oblast, 2025 14.09.2025 · Ryazan Oblast |
| Kosyakov Aleksey Nikolaevich b. 02.10.1948 · Nominated · CPRF | Regional assembly, Republic of Buryatia, 2013 08.09.2013 · Republic of Buryatia |
| Kosyakov Sergey Nikolaevich b. 1979 · Nominated · United Russia | Regional assembly, Kamchatka Krai, 2026 20.09.2026 · Kamchatka Krai |
| Kosyakova Galina Ivanovna b. 17.05.1961 · Nominated · CPRF | Regional assembly, Zabaykalsky Krai, 2023 10.09.2023 · Zabaykalsky Krai |
| Kosyakova Galina Ivanovna b. 17.05.1961 · Nominated · CPRF | Regional assembly, Zabaykalsky Krai, 2018 09.09.2018 · Zabaykalsky Krai |
| Kosyan Khachatur Manvelovich b. 28.08.1995 · Nominated · A Just Russia | Regional assembly, Republic of Bashkortostan, 2023 10.09.2023 · Republic of Bashkortostan |
| Kosyanenko Evgeniy Viktorovich b. 29.08.1963 · Nominated · United Russia | Regional assembly, Kemerovo Oblast – Kuzbass, 2013 08.09.2013 · Kemerovo Oblast – Kuzbass |
| Kosyanikov Sergey Vasilevich b. 20.03.1976 · Nominated · United Russia | Regional assembly, Krasnodar Krai, 2022 11.09.2022 · Krasnodar Krai |
| Kosyanikov Sergey Vasilevich b. 20.03.1976 · Nominated · United Russia | Regional assembly, Krasnodar Krai, 2022 11.09.2022 · Krasnodar Krai |
| Kosyanikov Sergey Vasilevich b. 20.03.1976 · Nominated · United Russia | Regional assembly, Krasnodar Krai, 2017 10.09.2017 · Krasnodar Krai |
| Kot Natalya Anatolevna b. 03.03.1975 · Nominated · CPRF | Regional assembly, Stavropol Krai, 2016 18.09.2016 · Stavropol Krai |
| Kot Natalya Anatolevna b. 03.03.1975 · Nominated · CPRF | Regional assembly, Stavropol Krai, 2021 19.09.2021 · Stavropol Krai |
| Kot Natalya Anatolevna b. 03.03.1975 · Nominated · CPRF | Regional assembly, Stavropol Krai, 2016 18.09.2016 · Stavropol Krai |
