Grittleton is a village and civil parish in Wiltshire, England, 6 miles northwest of Chippenham. The parish includes the hamlets of Foscote, Leigh Delamere, Littleton Drew and Sevington, and part of the hamlet of The Gibb. The Gauze Brook, a small tributary of the Avon, rises near Littleton Drew and flows east across the parish. The M4 motorway was opened in 1971 across the south of the parish, passing close to The Gibb, Foscote, Sevington and Leigh Delamere.