Lincolnshire is a county in eastern England, with a long coastline on the North Sea to the east. It borders Norfolk to the south east, Cambridgeshire to the south, Rutland to the south west, Leicestershire and Nottinghamshire to the west, South Yorkshire to the north west, and the East Riding of Yorkshire to the north. It also borders Northamptonshire in the south for just 20 yards (18 m), England's shortest county boundary. The county town is the city of Lincoln, where the county council has its headquarters.