Londonthorpe is a village to the east of Grantham, in the civil parish of Londonthorpe and Harrowby Without, in South Kesteven district of Lincolnshire, England. It lies 3 miles (5 km) to the north-east from Grantham, 1 mile (1.6 km) to the west from the B6403 (Ermine Street Roman road), and borders Belton Park in the west. The village is part of the civil parish of Londonthorpe and Harrowby Without. Until 1931 Londonthorpe had been a civil parish in its own right. Earthworks of unknown origin lie to the west of the church