Kalyanpur is an assembly constituency in Samastipur district in the Indian state of Bihar. The seat is reserved for scheduled castes.OverviewAs per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No. 131 Kalyanpur (Vidhan Sabha constituency) is composed of the following: Kalyanpur and Pusa community development blocks.Kalyanpur (Vidhan Sabha constituency) (SC) is part of No. 23 Samastipur (Lok Sabha constituency). Its Kushwaha dominated constituency in Bihar.