Jorhat {Pron:ˈʤɔ:(r)ˌhɑ:t} is an administrative district of Assam, located in the central part of Brahmaputra Valley. The district is bounded by Lakhimpur district on north, Nagaland state on the south, Sivasagar on the east and Golaghat on the west. On the North of the district, the river Brahmaputra forms the largest riverine island of the world. The administrative seat is located at Jorhat town.Earlier Jorhat was a sub-division of undivided Sibsagar district.