Langtoft is a village and civil parish in the South Kesteven district of Lincolnshire, England. The population of the civil parish at the 2011 census was 2,045. It lies on the A15 road, about 10mi north from Peterborough and about 8mi east from Stamford, and on the edge of The Fens. Langtoft falls within the drainage area of the Welland and Deepings Internal Drainage Board.