MassGIS 2000 Massachusetts Town Boundaries (March 1991)
The political boundary datalayer is a 1:25,000 scale datalayer containing the boundaries of the 351 communities in Massachusetts. The seaward boundary of coastal communities has been defined at mean high water in this datalayer. Note that the 351 communities are the official municipal names, not including "villages" or other sections of towns.
Office of Geographic and Environmental Information (MassGIS)