Bihar (; Hindi pronunciation: [bɪˈɦaːr] (listen)) is a declare in eastern India. It is the third-largest declare by population and twelfth-largest by territory, with an area of 94,163 km² (36,357 sq mi). It is contiguous later Uttar Pradesh to its west, Nepal to the north, the northern allowance of West Bengal to the east, and afterward Jharkhand to the south. The Bihar plain is split by the river Ganges, which flows from west to east. Three main cultural regions converge in the state: Magadh, Mithila, and Bhojpur. Bihar is as well as the world’s third-most populous subnational entity.