Kaulapur is a village in Mainatanr tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Kaulapur was 472 which includes 244 males and 228 females. Kaulapur covers 312.9 ha area. Pincode of Kaulapur is N/A.