Kalgiganj is a village in Colgong tehsil in district of Bhagalpur, Bihar, India. As per the data provided by Census of India in 2011, total population of Kalgiganj was 3,253 which includes 1,753 males and 1,500 females. Kalgiganj covers 173 ha area. Pincode of Kalgiganj is 813203.