Massachusetts Senate districts are named for the counties that contain a portion of the district ordered by percentage of the district's population that is within that county. If multiple districts would have the same name under this scheme, they are also given an ordinal number. The one exception is "Cape and Islands" which if the naming scheme were followed would be "Barnstable, Dukes, and Nantucket". • Berkshire, Hampden, Franklin, and Hampshire • Bristol and Norfolk • First Bristol and Plymouth • Second Bristol and Plymouth • Third Bristol and Plymouth • Cape and Islands • First Essex • Second Essex • Third Essex • First Essex and Middlesex • Second Essex and Middlesex • Hampden • Hampden and Hampshire • Hampden, Hampshire, and Worcester • Hampshire, Franklin, and Worcester • First Middlesex • Second Middlesex • Third Middlesex • Fourth Middlesex • Fifth Middlesex • Middlesex and Norfolk • Middlesex and Suffolk • Middlesex and Worcester • Norfolk and Middlesex • Norfolk and Plymouth • Norfolk, Plymouth, and Bristol • Norfolk and Suffolk • Norfolk, Worcester, and Middlesex • Plymouth and Barnstable • First Plymouth and Norfolk • Second Plymouth and Norfolk • First Suffolk • Second Suffolk • Third Suffolk • Suffolk and Middlesex • First Worcester • Second Worcester • Worcester and Hampden • Worcester and Hampshire • Worcester and Middlesex ==Current committees and members==