| | | Essex County | MA | 25009 | Cambridge-Newton-Framingham,
MA 15764 | Boston-Cambridge-Newton,
MA-NH 14460 | Boston-Worcester-Providence,
MA-RI-NH-CT 148 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=EssexCounty+MA |
| | | Middlesex County | MA | 25017 | Cambridge-Newton-Framingham,
MA 15764 | Boston-Cambridge-Newton,
MA-NH 14460 | Boston-Worcester-Providence,
MA-RI-NH-CT 148 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=MiddlesexCounty+MA |
| | | Norfolk County | MA | 25021 | Boston, MA 14454 | Boston-Cambridge-Newton,
MA-NH 14460 | Boston-Worcester-Providence,
MA-RI-NH-CT 148 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=NorfolkCounty+MA |
| | | Plymouth County | MA | 25023 | Boston, MA 14454 | Boston-Cambridge-Newton,
MA-NH 14460 | Boston-Worcester-Providence,
MA-RI-NH-CT 148 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=PlymouthCounty+MA |
| | | Rockingham County | NH | 33015 | Rockingham
County-Strafford County,
NH 40484 | Boston-Cambridge-Newton,
MA-NH 14460 | Boston-Worcester-Providence,
MA-RI-NH-CT 148 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=RockinghamCounty+NH |
| | | Strafford County | NH | 33017 | Rockingham
County-Strafford County,
NH 40484 | Boston-Cambridge-Newton,
MA-NH 14460 | Boston-Worcester-Providence,
MA-RI-NH-CT 148 | Outlying | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=StraffordCounty+NH |
| | | Suffolk County | MA | 25025 | Boston, MA 14454 | Boston-Cambridge-Newton,
MA-NH 14460 | Boston-Worcester-Providence,
MA-RI-NH-CT 148 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SuffolkCounty+MA |
