Kairbirpur is a village in Kochadhamin tehsil in district of Kishanganj, Bihar, India. As per the data provided by Census of India in 2011, total population of Kairbirpur was 4,211 which includes 2,238 males and 1,973 females. Kairbirpur covers 188 ha area. Pincode of Kairbirpur is 855101.