Kalyanpur Khas is a village in Kotwa tehsil in district of Purba Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Kalyanpur Khas was 1,850 which includes 1,025 males and 825 females. Kalyanpur Khas covers 123.8 ha area. Pincode of Kalyanpur Khas is 845437.