Chengalpattu

There were a total of 366400 registered voters on the electoral rolls for the 2026 Assembly election in Chengalpattu Assembly constituency, of whom 178076 were male, 188267 female and 57 belonged to the third gender.

In the 2021 Assembly elections, there were a total of 428379 registered voters, of whom 210518 were male, 217806 female and 55 belonged to the third gender. In the 2016 Assembly elections, there were a total of 371109 registered voters, of whom 183279 were male, 187787 were female and 43 belonged to the third gender. In 2011 elections, there were a total of 252356 registered voters in this constituency, of whom 127482 were male, 124874 were female and 53 belonged to the third gender.

The number of service voters in this Assembly constituency was 61 in 2021, 51 in 2016, and 54 in 2011.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2026 was 1057, in 2021 it was 1035, 1025 in 2016, and 980 in 2011.

Chengalpattu Assembly constituency will go to the polls in Phase 1 of the 2026 Tamil Nadu Assembly elections on Thursday, April 23, 2026. The counting of votes will take place on Monday, May 4, 2026.

In the 2021 state Assembly elections, this seat voted in Phase 1 on Tuesday, April 6, 2021 and the results were declared on Sunday, May 2, 2021.

In the 2016 state Assembly elections, this seat voted in Phase 1 on Monday, May 16, 2016 and the results were declared on Thursday, May 19, 2016.

In the 2011 polls, this constituency voted in Phase 1 on Wednesday, April 13, 2011 and the results were declared on Friday, May 13, 2011.

Chengalpattu Assembly constituency comprises the following areas of Kancheepuram district in the North region of Tamil Nadu: Chengalpattu Taluk (Part) Mannivakkam, Nedungundram, Puthur, Kolapakkam, Unamancheri, Rattinamangalam, Vengadamangalam, Nallambakkam, Arungal, Karanaipuducheri, Gudalore R.F, Kayarambedu, Perumathunallur, Keerappakkam, Murugamangalam, Kumizhi, Othivakkam, Kannivakkam, Pandur, Appur R.F, Senthamangalam, Appur, Kalvoy, Hasthinapuram, Karunilam, Karambur, Kolathur, Dasarikunnathur, Guruvanmedu, Melmanapakkam, Palur, Villiambakkam, Sasthirambakkam, Vembakkam, Venkatapuram, Chettipunyam, Kachadimangalam, Kondamangalam, Anjur, Thenmelpakkam, Veerapuram, Paranur, Paranur R.F, Kanthalur, Athur, Pulipakkam, Rajakulipettai, Hanumanthai, Kunnavakkam, Echankaranai, Pattaravakkam, Senneri, Thenur, Ammanambakkam (Guduvanchery firka), Porunthavakkam, Vallam, Pazhaveli, Ozhalur, and Ammanambakkam ( Chengalpattu firka) villages. Melamaiyur (CT), Alapakkam (CT), Vandalur (CT) and Urapakkam (CT), Nandivaram-Guduvancheri (TP), Maraimalainagar (TP), Singaperumalkoil (CT) and Chengalpattu (M).

This constituency covers an approximate area of 341 square kilometers and the geographic coordinates of Chengalpattu is: 12°46'38.3"N 80°01'37.6"E.

According to data released by the Election Commission of India, In 2021, this seat registered a turnout of 63.54%, while it was 67.31% in 2016, and 74.08% in 2011.

In the 2021 Tamil Nadu Assembly elections, Varalakshmi M of DMK won in this constituency beating Gajendran M of AIADMK by a margin of 26665 votes which was 9.84% of the total votes cast. In 2016, Varalakshmi.M of DMK was the winner in this seat beating Kamalakkannan.R of AIADMK by a margin of 26292 votes which was 10.53% of the total votes polled in the constituency. In the 2011 Assembly elections, D. Murugesan of DMDK won this seat defeating V. G. Rangasamy of PMK by a margin of 291 votes which was 0.16% of the total votes polled for the seat.

In the 2021 Tamil Nadu Assembly elections, Varalakshmi M of DMK had a vote share of 48.18% in this seat. In the 2016 Assembly elections, Varalakshmi.M of DMK got a vote share of 45.11% , In the 2011 Assembly elections, D. Murugesan of DMDK got a vote share of 44.58% in Chengalpattu.