Mohan Singh Gachh is a village in Bahadurganj tehsil in district of Kishanganj, Bihar, India. As per the data provided by Census of India in 2011, total population of Mohan Singh Gachh was 688 which includes 327 males and 361 females. Mohan Singh Gachh covers 48 ha area. Pincode of Mohan Singh Gachh is 855101.