Sewstern is a village in the Melton district of east Leicestershire.
It lies just south of Buckminster, with which it shares a primary school, situated between the two villages, and a parish council. The road bisecting the village along a north–south direction (Timber Hill and Stamford Road) is the Romano-Briton byway called Sewstern Lane, which at this point (and for most of its length) is the border between Lincolnshire and Leicestershire. The small part of Sewstern to the east of this road is now squeezed into Leicestershire, in a 'Leicestershire-annexe'. It serves as the Viking Way.
Nearby to the east along Gunby Road is Gunby. The village pub on Main Street is the Blue Dog. The village church is dedicated to Holy Trinity.