Rajnagar, Bihar Assembly constituency

Rajnagar Assembly constituency is an assembly constituency in Madhubani district in the Indian state of Bihar. It is reserved for scheduled castes.

Overview
As per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No. 37 Rajnagar Assembly constituency is composed of the following: Rajnagar and Andhratharhi community development blocks.

Rajnagar Assembly constituency is part of No. 7 Jhanjharpur (Lok Sabha constituency).

2020
In the Bihar Legislative Assembly election of 2015, the Communist Party of India (CPI) won Rajnagar seat by defeating rival Ramavtar Paswan of RJD.