Washingborough is a village in the North Kesteven district in Lincolnshire, England. Located 3 miles (5 km) east of Lincoln and 18 miles (29 km) from Sleaford. The population in the 2001 census was 3,356, increasing to 3,482 at the 2011 census. It is situated on the lower slopes of Lincoln Cliff limestone escarpment where the River Witham breaks through it. The south side of Lincoln Cathedral and its three towers can be seen from the village centre.

The Car Dyke was, and to a large extent still is, a long ditch which runs along the western edge of the Fens in eastern England for a distance of over 57 miles (92 km). It is generally accepted as being of Roman age and, for many centuries, to have been taken as marking the western edge of the Fens. The name derives from carr, a fourteenth-century word for marsh or drained land.