Kolomna constituency

The Kolomna constituency is a Russian legislative constituency in Moscow Oblast. The constituency covers south-eastern Moscow Oblast.
The constituency has been represented since 2021 by United Russia deputy Nikita Chaplin, former First Deputy Chairman of the Moscow Oblast Duma and son of former Senator Yury Chaplin, who won the open seat, succeeding one-term United Russia incumbent Yelena Serova, after the latter unsuccessfully sought re-election only through party-list representation.

Boundaries

1993–1995: Kashira, Kashirsky District, Kolomensky District, Kolomna, Lukhovitsky District, Ozyory, Ozyorsky District, Serebryano-Prudsky District, Stupino, Stupinsky District, Yegoryevsk, Yegoryevsky District, Zaraysk, Zaraysky District

The constituency covered south-eastern Moscow Oblast, including the cities Kashira, Kolomna, Ozyory, Stupino, Yegoryevsk and Zaraysk.
1995–2007: Kashirsky District, Kolomensky District, Kolomna, Lukhovitsky District, Ozyorsky District, Serebryano-Prudsky District, Voskresensky District, Zaraysky District

The constituency was significantly altered following the 1995 redistricting, losing Stupinsky District to Serpukhov constituency and Yegoryevsky District to Orekhovo-Zuyevo constituency. This seat instead gained Voskresensky District to its north from Orekhovo-Zuyevo constituency.
2016–2026: Kolomensky District, Kolomna, Lukhovitsy, Serebryanye Prudy, Voskresensk, Yegoryevsk, Zaraysk

The constituency was re-created for the 2016 election and retained almost all of its former territory, except for Kashirsky District which was ceded to Serpukhov constituency. This seat gained Yegoryevsky District from the former Orekhovo-Zuyevo constituency.
Since 2026: Kashira, Kolomna, Lukhovitsy, Ramensky District, Serebryanye Prudy, Zaraysk

After the 2025 redistricting the constituency was changed, regaining Kashirsky District and again losing Yegoryevsky District. The constituency also gained western edges of Ramensky District from Lyubertsy constituency.

Members elected

Election results

1993

! colspan=2 style="background-color:#E9E9E9;text-align:left;vertical-align:top;" |Candidate
! style="background-color:#E9E9E9;text-align:left;vertical-align:top;" |Party
! style="background-color:#E9E9E9;text-align:right;" |Votes
! style="background-color:#E9E9E9;text-align:right;" |%

Kolomna constituency

Boundaries

Members elected

Election results

1993

1995 by-election

1995

1999

2001

2003

2016

2021