Koilbhupat is a village in Kaler tehsil in district of Arwal, Bihar, India. As per the data provided by Census of India in 2011, total population of Koilbhupat was 1,917 which includes 980 males and 937 females. Koilbhupat covers 352 ha area. Pincode of Koilbhupat is 804430.