Jamunapur is a village in Kalyanpur tehsil in district of Purba Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Jamunapur was 2,198 which includes 1,160 males and 1,038 females. Jamunapur covers 211 ha area. Pincode of Jamunapur is 845432.