Kelstern is a village in the civil parish of Calcethorpe with Kelstern, in the East Lindsey district of Lincolnshire, England. The village is north from the A631 road, 5 miles (8.0 km) north-west from Louth and 4 miles (6 km) south-east from Binbrook. Calcethorpe with Kelstern parish also includes the hamlets of Calcethorpe to the south of Kelstern, and Lambcroft to the north. Calcethorpe, with South Cadeby, immediately to its south, is the site of lost medieval villages of the same names, managed by Defra to preserve wildlife. To the east of the village are Bronze Age barrows.