Horningsea is a small village north of Cambridge in Cambridgeshire in England. The parish covers an area of 2.6 square miles. It lies on the east bank of the River Cam, and on the road from Cambridge to Clayhithe. The nearest railway station is Waterbeach, 1+1⁄2 miles (2.4 km) away.

South Cambridgeshire is a local government district of Cambridgeshire, England, with a population of 162,119 at the 2021 census. It was formed on 1 April 1974 by the merger of Chesterton Rural District and South Cambridgeshire Rural District. It completely surrounds the city of Cambridge, which is administered separately from the district by Cambridge City Council.