| Silantev Mikhail Sergeevich b. 08.02.1972 · Elected deputy · LDPR | Regional assembly, Arkhangelsk Oblast, 2004 19.12.2004 · Arkhangelsk Oblast |
| Silantev Mikhail Sergeevich b. 08.02.1972 · Elected deputy · Self-nomination | Regional assembly, Arkhangelsk Oblast, 2001 25.03.2001 · Arkhangelsk Oblast |
| Silin Roman Anatolevich b. 29.11.1973 · Elected deputy · CPRF | Regional assembly, Republic of Karelia, 2011 04.12.2011 · Republic of Karelia |
| Silchenkov Sergey Lvovich b. 17.12.1960 · Elected deputy · LDPR | Regional assembly, Amur Oblast, 2011 04.12.2011 · Amur Oblast |
| Silyutin Sergey Vladimirovich b. 03.10.1955 · Elected deputy · United Russia | Regional assembly, Karachay-Cherkess Republic, 2009 01.03.2009 · Karachay-Cherkess Republic |
| Simagin Vladimir Aleksandrovich b. 05.08.1974 · Elected deputy · CPRF | State Duma, 2011 04.12.2011 · Russian Federation |
| Simakov Andrey Anatolevich b. 25.05.1966 · Elected deputy · United Russia | Regional assembly, Republic of Tatarstan, 2009 01.03.2009 · Republic of Tatarstan |
| Simakov Konstantin Pavlovich b. 25.12.1952 · Elected deputy · United Russia | Regional assembly, Vologda Oblast, 2007 11.03.2007 · Vologda Oblast |
| Simakov Konstantin Pavlovich b. 25.12.1952 · Elected deputy · United Russia | Regional assembly, Vologda Oblast, 2011 04.12.2011 · Vologda Oblast |
| Simanovskiy Aleksandr Alekseevich b. 27.04.1958 · Elected deputy · United Russia | Regional assembly, Krasnoyarsk Krai, 2007 15.04.2007 · Krasnoyarsk Krai |
| Simanovskiy Aleksandr Alekseevich b. 27.04.1958 · Elected deputy · United Russia | Regional assembly, Krasnoyarsk Krai, 2011 04.12.2011 · Krasnoyarsk Krai |
| Simanovskiy Leonid Yakovlevich b. 19.07.1949 · Elected deputy · United Russia | State Duma, 2007 02.12.2007 · Russian Federation |
| Simanovskiy Leonid Yakovlevich b. 19.07.1949 · Elected deputy · United Russia | State Duma, 2003 07.12.2003 · Russian Federation |
| Simanovskiy Leonid Yakovlevich b. 19.07.1949 · Elected deputy · United Russia | State Duma, 2011 04.12.2011 · Russian Federation |
| Simigin Pavel Vladimirovich b. 26.07.1968 · Elected deputy · United Russia | State Duma, 2021 19.09.2021 · Russian Federation |
| Simonov Vladimir Ivanovich b. 12.05.1956 · Elected deputy · United Russia | Regional assembly, Yaroslavl Oblast, 2004 14.03.2004 · Yaroslavl Oblast |
| Simonov Vladimir Fedorovich b. 23.01.1956 · Elected deputy · United Russia | Regional assembly, Samara Oblast, 2011 04.12.2011 · Samara Oblast |
| Simonov Gennadiy Vladimirovich b. 28.04.1963 · Elected deputy · Voters’ group | Regional assembly, Amur Oblast, 2005 27.03.2005 · Amur Oblast |
| Simunov Lev Nikolaevich b. 22.03.1961 · Elected deputy · United Russia | Regional assembly, Chuvash Republic, 2006 08.10.2006 · Chuvash Republic |
| Sineev Vladimir Fedorovich b. 12.02.1955 · Elected deputy · CPRF | Regional assembly, Chuvash Republic, 2006 08.10.2006 · Chuvash Republic |
| Sinelschikov Yuriy Petrovich b. 26.09.1947 · Elected deputy · CPRF | State Duma, 2011 04.12.2011 · Russian Federation |
| Sinenko Valeriy Nikolaevich b. 07.09.1952 · Elected deputy · CPRF | Regional assembly, Novosibirsk Oblast, 2010 10.10.2010 · Novosibirsk Oblast |
| Sinitsa Elena Vyacheslavovna b. 1972 · Elected · United Russia | Regional assembly, Ryazan Oblast, 2025 14.09.2025 · Ryazan Oblast |
| Sinitsin Ivan Nikolaevich b. 25.09.1958 · Elected deputy · Self-nomination | Regional assembly, Vladimir Oblast, 2000 10.12.2000 · Vladimir Oblast |
| Sinitsin Ivan Nikolaevich b. 25.09.1958 · Elected deputy · United Russia | Regional assembly, Vladimir Oblast, 2005 20.03.2005 · Vladimir Oblast |
| Sinitsyna Irina Nikolaevna b. 22.03.1964 · Elected deputy · United Russia | Regional assembly, Kemerovo Oblast – Kuzbass, 2008 12.10.2008 · Kemerovo Oblast – Kuzbass |
| Sinichkin Vasiliy Pavlovich b. 10.04.1959 · Elected deputy · Self-nomination | Regional assembly, Saratov Oblast, 2002 01.12.2002 · Saratov Oblast |
| Sinichkin Vasiliy Pavlovich b. 10.04.1959 · Elected deputy · United Russia | Regional assembly, Saratov Oblast, 2007 02.12.2007 · Saratov Oblast |
| Sintsova Irina Aleksandrovna b. 30.11.1959 · Elected deputy · United Russia | Regional assembly, Irkutsk Oblast, 2008 12.10.2008 · Irkutsk Oblast |
| Sinkov Aleksandr Nikolaevich b. 01.02.1952 · Elected deputy · United Russia | Regional assembly, Amur Oblast, 2011 04.12.2011 · Amur Oblast |
| Sinkov Aleksandr Nikolaevich b. 01.02.1952 · Elected deputy · Self-nomination | Regional assembly, Amur Oblast, 2005 27.03.2005 · Amur Oblast |
| Sinkov Aleksandr Nikolaevich b. 01.02.1952 · Elected deputy · United Russia | Early · Regional assembly, Amur Oblast, 2008 02.03.2008 · Amur Oblast |
| Sinyukov Sergey Valerevich b. 1974 · Elected · United Russia | Regional assembly, Voronezh Oblast, 2025 14.09.2025 · Voronezh Oblast |
| Sinyagin Aleksandr Mikhaylovich b. 13.10.1949 · Elected deputy · Self-nomination | Regional assembly, Vladimir Oblast, 2000 10.12.2000 · Vladimir Oblast |
| Sinyagin Aleksandr Mikhaylovich b. 13.10.1949 · Elected deputy · CPRF | Regional assembly, Vladimir Oblast, 2005 20.03.2005 · Vladimir Oblast |
| Sinyagin Sergey Alekseevich b. 02.08.1964 · Elected deputy · United Russia | Regional assembly, Jewish Autonomous Oblast, 2011 04.12.2011 · Jewish Autonomous Oblast |
| Sinyagovskiy Vladimir Ilich b. 09.08.1948 · Elected deputy · United Russia | State Duma, 2016 18.09.2016 · Russian Federation |
| Sipyagin Vladimir Vladimirovich b. 19.02.1970 · Elected · LDPR | Repeat · Governor, Vladimir Oblast, 2018 23.09.2018 · Vladimir Oblast |
| Sirotin Anatoliy Ivanovich b. 03.07.1953 · Elected deputy · CPRF | Regional assembly, Lipetsk Oblast, 2011 04.12.2011 · Lipetsk Oblast |
| Sirotkin Sergey Nikanorovich b. 14.04.1952 · Elected deputy · Self-nomination | By-election · Regional assembly, Ivanovo Oblast, 2001 04.03.2001 · Ivanovo Oblast |
| Sirotkin Sergey Nikanorovich b. 14.04.1952 · Elected deputy · LDPR | State Duma, 2003 07.12.2003 · Russian Federation |
| Sitdykova Guzal Ramazanovna b. 10.06.1952 · Elected deputy · United Russia | Regional assembly, Republic of Bashkortostan, 2003 16.03.2003 · Republic of Bashkortostan |
| Sitkin Oleg Viktorovich b. 1984 · Elected · United Russia | Regional assembly, Novosibirsk Oblast, 2025 14.09.2025 · Novosibirsk Oblast |
| Sitnikov Aleksey Vladimirovich b. 19.06.1971 · Elected deputy · United Russia | State Duma, 2011 04.12.2011 · Russian Federation |
| Sitnikov Aleksey Vladimirovich b. 19.06.1971 · Elected deputy · Self-nomination | Repeat · Regional assembly, Kostroma Oblast, 2004 14.03.2004 · Kostroma Oblast |
| Sitnikov Aleksey Vladimirovich b. 19.06.1971 · Elected deputy · United Russia | Regional assembly, Kostroma Oblast, 2010 10.10.2010 · Kostroma Oblast |
| Sitnikov Aleksey Vladimirovich b. 19.06.1971 · Elected deputy · United Russia | State Duma, 2021 19.09.2021 · Russian Federation |
| Sitnikov Aleksey Vladimirovich b. 19.06.1971 · Elected deputy · United Russia | State Duma, 2016 18.09.2016 · Russian Federation |
| Sitnikov Viktor Aleksandrovich b. 05.12.1960 · Elected deputy · United Russia | Regional assembly, Lipetsk Oblast, 2011 04.12.2011 · Lipetsk Oblast |
| Sitnikov Roman Vladimirovich b. 1980 · Elected · United Russia | By-election · Regional assembly, Zabaykalsky Krai, 2025 14.09.2025 · Zabaykalsky Krai |
