By-elections to the 7th Russian State Duma were held to fill vacancies in the State Duma between the 2016 election and the 2021 election.
Samara constituency is a Russian legislative constituency in Samara Oblast. In its current configuration the constituency covers parts of Samara, Novokuybyshevsk and south-eastern Samara Oblast. Until 2007 the constituency was based entirely in metropolitan Samara.
The Preobrazhensky Constituency (No.205) is a Russian legislative constituency in Moscow. It is based in Eastern Moscow.
The Angarsk Constituency (No.94) is a Russian legislative constituency in Irkutsk Oblast. It was previously located in south-central Irkutsk Oblast, anchoring in Angarsk, Cheremkhovo, Shelekhov and Usolye-Sibirskoye. In 2003 Irkutsk Oblast lost one of its constituencies, so Angarsk constituency absorbed most of former Tulun constituency, which pitted incumbents in both districts against each other. In its current configuration Angarsk constituency stretches from northern Irkutsk to parts of former Ust-Orda Buryat Autonomous Okrug, which had its own constituency in 1993-2007.
The Buryatia Constituency (No.9) is a Russian legislative constituency in the Republic of Buryatia. The constituency is the only one in Buryatia, and occupies the whole of its territory.
The Amur Constituency (No.71) is a Russian legislative constituency in Amur Oblast. The constituency is the only one in Amur Oblast, and occupies the whole of its territory.
The Kaliningrad Constituency (No.97) is a Russian legislative constituency in Kaliningrad Oblast. Until 2007 Kaliningrad Oblast had a single constituency but its received a second one in 2016 redistricting. Since 2016 Kaliningrad constituency covers parts of Kaliningrad and northern Kaliningrad Oblast.
The Novgorod Constituency (No.134) is a Russian legislative constituency covering the entirety of Novgorod Oblast.
The Prioksky constituency is a Russian legislative constituency in Nizhny Novgorod Oblast. Until 2007 it covered southwestern Nizhny Novgorod Oblast, including Arzamas, Sarov and Vyksa. In 2016 most of former Arzamassky constituency was placed into Prioksky constituency, which was stretched to the Prioksky District of Nizhny Novgorod, however, the constituency lost its western part.
The Avtozavodsky constituency (No.131) is a Russian legislative constituency in Nizhny Novgorod Oblast. Until 2007 the constituency covered Avtozavodsky, Leninsky and Sovetsky City Districts of Nizhny Novgorod. In 2016 Avtozavodsky constituency only retained Avtozavodsky City District but it took Pavlovo from former Dzerzhinsk constituency and Vyksa from former Arzamas constituency.
The Kanavinsky constituency (No.132) is a Russian legislative constituency in Nizhny Novgorod Oblast. Until 2007 the constituency covered Kanavinsky, Moskovsky, Nizhegorodsky and Sormovsky City Districts of Nizhny Novgorod. In 2016 Kanavinsky constituency was stretched to the west to take parts of the dismantled Dzerzhinsk constituency.
The Bor constituency (No.133) is a Russian legislative constituency in Nizhny Novgorod Oblast. It covers northern Nizhny Novgorod Oblast.
The Dzerzhinsk constituency (No.119) was a Russian legislative constituency in the Nizhny Novgorod Oblast in 1993–2007. The constituency covered western Nizhny Novgorod Oblast, including Dzerzhinsk and Pavlovo. In 2016 Nizhny Novgorod Oblast lost one of its constituencies and Dzerzhinsk constituency was partitioned between Avtozavodsky and Kanavinsky constituencies.
The Kotlas constituency (No.73) is a Russian legislative constituency in Arkhangelsk Oblast. In 1993-2007 the constituency covered upstate southern Arkhangelsk Oblast, however, in 2016 the constituency was changed: it took parts of Arkhangelsk and traded several districts in western Arkhangelsk Oblast with Arkhangelsk constituency for some territories in the north.
The Northern constituency (No.10) is a Russian legislative constituency covering the northern areas of Dagestan. Until 2007 the constituency covered the entirety of Makhachkala but in 2015 it shedded Leninsky City District to Central constituency.
The Southern constituency (No.12) is a Russian legislative constituency covering the southwestern areas of Dagestan. Until 2003 the constituency covered the entirety of Southern Dagestan, however, due to population growth in the region Buynaksk constituency lost its Caspian Sea coast part to newly-established Derbent constituency.
The Chusovoy constituency (No.59) is a Russian legislative constituency in Perm Krai. Until 2007 the constituency was more compact, covering half of Perm and several rural districts to the north of the city. However, after 2015 redistricting the constituency gave several parts of Perm to Kungur constituency, while gaining districts in eastern Perm Krai.
The Nizhny Tagil constituency (No.171) is a Russian legislative constituency in Sverdlovsk Oblast. The constituency covers central Sverdlovsk Oblast and anchors in the industrial city of Nizhny Tagil.
The Chelyabinsk constituency (No.189) is a Russian legislative constituency in Chelyabinsk Oblast. Until 2007 the constituency covered urban Chelyabinsk, however, after 2015 redistricting it was stretched to central Chelyabinsk Oblast.
The Southern constituency (No.151) is a Russian legislative constituency in Rostov Oblast. Until 2007 the constituency covered eastern Rostov-on-Don and its suburbs in Aksaysky District and Bataysk. However, after 2015 redistricting it lost Proletarsky District and parts of Aksaysky District to Rostov constituency, Bataysk to Nizhnedonskoy constituency, but it gained Novocherkassk.
