Tarapur is represented in the state legislative assembly by Mewa Lal Choudhary of Janata Dal (United), who got 64,199 votes by defeating Divya Prakash of Rashtriya Janata Dal (RJD). The constituency was a Congress stronghold from 1951 to 1967. Since 2010, JD(U) is winning the seat.

Tarapur legislative assembly segment, located in the Munger district, is part of the Jamui Lok Sabha constituency of Bihar. The Tarapur assembly constituency has a strong electorate of around 2,72,596 eligible voters. According to the recommendations of the Delimitation Commission of India in 2008, the Tarapur assembly segment comprises Dariyapur-1 and 2, Kharagpur (Notified Areas), Ramankabad (East), Ramankabad (West), Gangata, Majhgyan and Murade gram panchayats of Kharagpur community development block; Sangrampur, Asarganj community development block; Tetiha Bamber community development block; and Tarapur community development block. 

Here are a few details about the Tarapur assembly seat

Name of the assembly constituency, district: Tarapur, Munger

Lok Sabha constituency : Jamui Lok Sabha

Polling date: October 28

2020 Winner: Mewa Lal Choudhary, JD(U)

2020 Runner-up: Divya Prakash (RJD)

Winning margin in 2020: 7,225