Kalyanpur is an assembly constituency in Samastipur district in the Indian state of Bihar.

In this constituency, the contest for political representation used to be in between the members of Koeri and Bhumihar caste until 2010, when the constituency was reserved for the Schedule Castes.

The legislators belonging to the Koeri caste are Brahmdeo Narain Singh, Sita Sinha, Ashok Prasad Verma and Ashwamedh Devi among others.

[1][2] As per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No.

[3] Kalyanpur Assembly constituency (SC) is part of No.