How to use this list
Counties are sorted alphabetically. Use ZIP count and population to spot larger counties, then open a county for its ZIP roster and income/housing averages.
Massachusetts counties
14 counties · 539 ZIP codes · population 6,992,213 . Select a county to open its ZIP table and local summary.
Related pages
Also see the Massachusetts overview, cities, rankings, and congressional districts.
| County | ZIP codes | Population | Avg. income |
|---|---|---|---|
| Barnstable County | 47 | 231,302 | $103,801 |
| Berkshire County | 33 | 127,932 | $89,436 |
| Bristol County | 35 | 578,416 | $100,687 |
| Dukes County | 7 | 21,552 | $108,159 |
| Essex County | 44 | 807,230 | $124,718 |
| Franklin County | 29 | 69,941 | $82,332 |
| Hampden County | 39 | 462,760 | $78,519 |
| Hampshire County | 26 | 158,180 | $97,654 |
| Middlesex County | 81 | 1,613,655 | $148,086 |
| Nantucket County | 3 | 14,299 | $125,524 |
| Norfolk County | 40 | 737,720 | $150,092 |
| Plymouth County | 35 | 529,859 | $117,177 |
| Suffolk County | 35 | 777,732 | $102,992 |
| Worcester County | 85 | 861,635 | $106,957 |
Frequently asked questions
- How many counties are listed for Massachusetts?
- US5 currently lists 14 counties with published ZIP coverage in Massachusetts. Counts can change as geography publishes update.
- What happens when I open a county?
- Each county page shows ZIP totals, income and housing averages, and a ZIP table. From there you can open any ZIP for a full demographics dashboard.