Lincolnshire (/ˈlɪŋkənʃər, -ʃɪər/) is a ceremonial county in the East Midlands and Yorkshire and the Humber regions of England. It is bordered by the East Riding of Yorkshire across the Humber estuary to the north, the North Sea to the east, Norfolk, Cambridgeshire, Northamptonshire and Rutland to the south, and Leicestershire, Nottinghamshire and South Yorkshire to the west.
The county is predominantly rural, with an area of 6,959 km (2,687 sq mi) and a population of 1,120,749 in 2024. The port town of Grimsby is located in the north-east coast of the county, Boston in the south-east, Grantham in the south-west, the city of Lincoln in the west, and Scunthorpe in the north-west. For local government purposes Lincolnshire comprises a non-metropolitan county, with seven districts, and the unitary authority areas of North Lincolnshire and North East Lincolnshire. The last two areas are part of the Yorkshire and the Humber region, and the rest of the county is in the East Midlands. The non-metropolitan county council and two unitary councils collaborate through the Greater Lincolnshire Combined County Authority.