Kishunpur is a major town in Supaul District of Bihar. It lies on the banks of Kosi River – a prominent tributary of the Ganges. Supaul, the district headquarters, is 13 km south.
Pipra (15 km south east), Marauna (21 km south-west), Madhepur (23 km south-west) and Nirmali (13 km north) are the major settlements near Kishunpur.