Diamond Harbour

There were a total of 252914 registered voters on the electoral rolls for the 2026 Assembly election in Diamond Harbour Assembly constituency, of whom 129276 were male, 123634 female and 4 belonged to the third gender.

In the 2021 Assembly elections, there were a total of 254964 registered voters, of whom 128803 were male, 126156 female and 5 belonged to the third gender. In the 2016 Assembly elections, there were a total of 226308 registered voters, of whom 116516 were male, 109788 were female and 4 belonged to the third gender. In 2011 elections, there were a total of 192505 registered voters in this constituency, of whom 100578 were male, 91927 were female and 0 belonged to the third gender.

The number of service voters in this Assembly constituency was 168 in 2021, 110 in 2016, and 75 in 2011.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2026 was 956, in 2021 it was 979, 942 in 2016, and 914 in 2011.

Diamond Harbour Assembly constituency will go to the polls in Phase 2 of the 2026 West Bengal Assembly elections on Wednesday, April 29, 2026. The counting of votes will take place on Monday, May 4, 2026.

In the 2021 state Assembly elections, this seat voted in Phase 3 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 6 on Saturday, April 30, 2016 and the results were declared on Thursday, May 19, 2016.

In the 2011 polls, this constituency voted in Phase 3 on Wednesday, April 27, 2011 and the results were declared on Friday, May 13, 2011.

Diamond Harbour Assembly constituency comprises the following areas of South 24 Parganas district in the South East Bengal region of West Bengal: 1. Kamarpol, Khordo, Mathur, Nurpur, Patra and Sarisa GPs of CDB Diamond Harbour - II 2. Diamond Harbour (M) and 3. Basuldanga, Bolsiddhi Kali Nagar, Derak, Harindanga, Kanpur Dhanaberia, Mashat and Parulia GPs of CDB Diamond Harbour-I

This constituency covers an approximate area of 178 square kilometers and the geographic coordinates of Diamond Harbour is: 22°13'28.2"N 88°10'32.5"E.

According to data released by the Election Commission of India, In 2021, this seat registered a turnout of 88.04%, while it was 88.88% in 2016, and 85.39% in 2011.

In the 2021 West Bengal Assembly elections, Pannalal Halder of TMC won in this constituency beating Dipak Kumar Halder of BJP by a margin of 16996 votes which was 7.59% of the total votes cast. In 2016, Dipak Kumar Halder of TMC was the winner in this seat beating Dr. Abul Hasnat of CPIM by a margin of 15037 votes which was 7.54% of the total votes polled in the constituency. In the 2011 Assembly elections, Dipak Kumar Halder of TMC won this seat defeating Subhra Sau of CPIM by a margin of 20774 votes which was 12.65% of the total votes polled for the seat.

In the 2021 West Bengal Assembly elections, Pannalal Halder of TMC had a vote share of 43.97% in this seat. In the 2016 Assembly elections, Dipak Kumar Halder of TMC got a vote share of 48.58% , In the 2011 Assembly elections, Dipak Kumar Halder of TMC got a vote share of 53.37% in Diamond Harbour.