Mangaldoi parliamentary constituency is one of the 14 Lok Sabha constituencies of the north-eastern state of Assam.

Mangaldoi Lok Sabha constituency is currently held by Ramen Deka of the Bharatiya Janata Party (BJP), who defeated Kirip Challiha of the Congress in the 2014 Lok Sabha elections. BJP will look to retain the seat in the 2019 Lok Sabha elections.
There were 1,515,676 electorate in the Mangaldoi Lok Sabha Constituency in 2014 elections, out of which 791,539 are male and the remaining 724,137 are female.
Name of the Lok Sabha constituency: Mangaldoi
State: Assam
Lok Sabha constituency: Mangaldoi
Date of voting: April 18
2019 candidates: Dilip Saikia (AGP), Bhubaneswar Kalita (Congress)
Sitting MP, Party: Ramen Deka, BJP
Winning margin in 2014: 22,884
Runner up name, party: Kirip Chaliha, Congress
Number of voters in 2014: 12,33,474
Percentage of votes polled in 2014: 53%
Number of polling booths in 2014: 1,852
Number of women voters: 724,137