1950-1983: The Municipal Boroughs of Blandford Forum and Shaftesbury, the Urban District of Wimborne Minster, and the Rural Districts of Blandford, Shaftesbury, Sturminster, and Wimborne and Cranborne.
1997-2010: The District of North Dorset, and the District of East Dorset wards of Colehill, Crane, Holt, Longham, Sixpenny Handley, Stapehill, Sturminster Marshall, Vale of Allen, and Wimborne Minster.