Udakishunganj is a community development block in the Udakishunganj subdivision of Madhepura district in the Indian state of Bihar. It forms an important administrative unit within the subdivision and consists of several panchayats and villages. The block headquarters are located about 35 kilometres (22 mi) from the district headquarters at Madhepura. Udakishunganj plays a key role in local governance and rural development programmes implemented under the Panchayati raj system in Bihar.