Consists of the following towns:

Ashland, Ayer, Berlin, Bolton, Boxborough, Boylston, Chelmsford, Clinton, Framingham, Franklin, Grafton, Groton, Harvard, Holden, Holliston, Hopkinton, Hudson, Lancaster, Marlborough, Medway, Northborough, Paxton, Shirley, Shrewsbury, Southborough, Sterling, Tyngsboro, Upton, West Boylston, Westborough, Westford, Worcester.