North Witham is a small village and nominally a civil parish in South Kesteven, Lincolnshire, England. The village is located along the upper course of the River Witham 1.5 miles downstream (north) of South Witham, and approximately 9 miles (14 km) south from the nearest major town, Grantham. It has an estimated population of 143 in around 72 households, at a density of 0.1/hectare.
The current civil parish of Colsterworth includes the hamlet of Lobthorpe. Nearby villages include Gunby, Colsterworth and Stainby.