Massachusetts County Map With Cities
By Marko Visic · Updated Oct 5, 2026
Massachusetts has 14 counties, covering 7,801 square miles of land. The Census Bureau estimates its population at 7,154,084 as of July 1, 2025. The largest county by land area is Worcester County; the most populous is Middlesex County; the least populous is Nantucket County.
Tap or click any county for details. Need a printable version? Blank Massachusetts map (PDF/PNG/SVG).
All 14 Massachusetts counties
| County | FIPS code | Population (July 1, 2025) ▼ | Change since April 2020 | Land area (sq mi) | People per sq mi | Median household income (2020–2024) |
|---|---|---|---|---|---|---|
| Middlesex County | 25017 | 1,669,979 | +2.3% | 818 | 2,042 | $130,847 |
| Worcester County | 25027 | 888,502 | +3.1% | 1,511 | 588 | $95,939 |
| Essex County | 25009 | 826,653 | +2.1% | 493 | 1,678 | $101,883 |
| Suffolk County | 25025 | 791,891 | -1.1% | 58 | 13,593 | $95,631 |
| Norfolk County | 25021 | 739,749 | +1.9% | 396 | 1,868 | $130,739 |
| Bristol County | 25005 | 593,640 | +2.5% | 553 | 1,073 | $85,625 |
| Plymouth County | 25023 | 546,829 | +3.0% | 659 | 830 | $114,201 |
| Hampden County | 25013 | 464,338 | -0.3% | 617 | 753 | $71,306 |
| Barnstable County | 25001 | 233,539 | +2.0% | 394 | 592 | $95,241 |
| Hampshire County | 25015 | 164,065 | +1.1% | 527 | 311 | $87,001 |
| Berkshire County | 25003 | 128,224 | -0.6% | 927 | 138 | $76,013 |
| Franklin County | 25011 | 70,698 | -0.5% | 699 | 101 | $74,907 |
| Dukes County | 25007 | 21,219 | +3.0% | 103 | 206 | $125,786 |
| Nantucket County | 25019 | 14,758 | +3.6% | 46 | 319 | $139,688 |
FIPS code: the Census Bureau’s five-digit county ID, a two-digit state code plus a three-digit county code. It is not a ZIP code.
How many counties does Massachusetts have?
Massachusetts has 14 counties, but several of them have no functioning county government — those counties were dissolved between 1997 and 2000, with their functions absorbed by the state. The remainder retain limited county-level operations.
The largest county by land area is Worcester County at 1,511 square miles, home to 888,502 residents. The most populous is Middlesex County with 1,669,979 residents — a density of 2,042 people per square mile. At the other end of the scale, Nantucket County has 14,758 residents.
Boston is both the state capital and the largest city in Massachusetts.
Related resources
Download a printable outline of Massachusetts’s county boundaries from our blank map of Massachusetts page — available in SVG, PNG, and PDF.
Use the What County Am I In? tool to detect which Massachusetts county a GPS location or address falls in, or the Address to County Lookup for batch input.
For demographic radius analysis, the Find ZIP Codes in Radius and Population Within Radius tools let you draw a circle around any Massachusetts address and see every ZIP code and the total population inside.
Two SimpleMapLab studies cover Massachusetts specifically: the 100-mile radius around Boston measures how much of the state lives within 100 miles of its capitol, and the loneliest town in Massachusetts ranks the state’s most isolated inhabited place. The county-counts blog post puts Massachusetts’s 14 counties in national context.
Frequently asked questions
- County Population Totals, Vintage 2025: estimates for July 1, 2025, released March 2026
- Gazetteer Files, 2026: county land and water area
- American Community Survey 5-Year Estimates, 2020–2024: median household income (table B19013)
- County boundaries on the map: US Atlas TopoJSON build of the US Census Bureau’s TIGER/Line shapefiles. All figures are US Census Bureau data in the public domain.