North Lincolnshire District is a unitary authority area in the region of Yorkshire and the Humber in England. For ceremonial purposes it is part of Lincolnshire. There are three significant towns: Scunthorpe (the administrative centre), Brigg and Barton-upon-Humber.
The district covers an area of 326.8 sq mi (846.3 km2) and in mid-2014 it had an estimated population of 169,250. It lies on the south side of the Humber estuary and consists mainly of agricultural land, including land on either side of the River Trent. It borders onto North East Lincolnshire, Lincolnshire, South Yorkshire, Nottinghamshire and the East Riding of Yorkshire. The council's administrative base is at the Civic Centre in Scunthorpe.
North Lincolnshire was created in 1996, on the abolition of short-lived county of Humberside (1974-1996). The district was formed by a merger of the boroughs of Glanford and Scunthorpe, and the southern part of the borough of Boothferry. Before the creation of Humberside in 1974, it was in the Part of Lindsey in Lincolnshire.
Wikimedia has a map of the post-1974 districts of Lincolnshire.