Castle Hedingham, Beauchamp Walter, Great Bentley, Great Canfield, Earls Colne, White Colne, and Dovercourt, Essex; Aldham, Belstead, Lavenham, and Waldingfield, Suffolk; Castle Camps, Hildersham, Silverley, and Wilbraham, Cambridgeshire.
The parish was formed in 1996 by a merger of the individual parishes of Copdock and Washbrook, though Washbrook lost some of its northeastern land area to Sproughton and Pinewood, whilst Copdock's eastern boundary with Belstead was redrawn to match the new route of the A12.