County ProfileMA
Middlesex County
Population: 1,632,002 · 99 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
1,632,002
People
Median age
38.9
Housing
Total households
634,215
Income
Median household income
$130,847
Housing
Total housing units
664,267
Employment
Employment rate
66.7%
Education
Bachelor’s degree or higher
59.5%
Healthcare
Insured population
97.6%
County details
Local time 03:46:16(ET)| Name | Middlesex |
|---|---|
| Total ZIP codes | 99total |
| ZIP codes (by type) | 83 Standard11 PO Box5 Unique |
| Area code | 339, 351, 508, 617, 774, 781, 857, 978 |
| Timezone | Eastern Time (ET) |
| Coordinates | 42.4817215, -71.394916 |
| Land area | 817.9 sq miles(2,118.4 km²) |
Map of Middlesex county, Massachusetts with ZIP codes
Cities and Communities in Middlesex County
Compare the largest cities in Middlesex County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.
| City | Population | Median incomeHousehold | ZIP codes |
|---|---|---|---|
| Cambridge | 118,403 | $130,748 | 6ZIPs |
| Lowell | 115,554 | $78,658 | 5ZIPs |
| Newton | 88,923 | $190,304 | 1ZIPs |
| Somerville | 81,045 | $132,572 | 3ZIPs |
| Framingham | 72,362 | $107,419 | 5ZIPs |
| Malden | 66,263 | $100,606 | 1ZIPs |
| Waltham | 65,218 | $120,216 | 4ZIPs |
| Medford | 59,659 | $129,540 | 2ZIPs |
| Everett | 49,075 | $85,218 | 1ZIPs |
| Arlington | 46,308 | $150,701 | 2ZIPs |
| Marlborough | 41,793 | $91,968 | 1ZIPs |
| Woburn | 40,876 | $111,185 | 4ZIPs |
| Lexington | 34,454 | $238,444 | 2ZIPs |
| Melrose | 29,817 | $133,953 | 1ZIPs |
| Belmont | 27,295 | $183,137 | 1ZIPs |
| Wakefield | 27,090 | $134,306 | 1ZIPs |
| Burlington | 26,377 | $146,436 | 2ZIPs |
| Reading | 25,518 | $165,912 | 1ZIPs |
| Wilmington | 23,349 | $168,152 | 1ZIPs |
| Stoneham | 23,244 | $113,964 | 1ZIPs |
| Winchester | 22,970 | $230,198 | 1ZIPs |
| Hudson | 15,749 | $90,524 | 1ZIPs |
| Maynard | 10,746 | $124,067 | 1ZIPs |
| Pinehurst | 7,368 | $146,250 | 1ZIPs |
| Ayer | 2,986 | $74,878 | 1ZIPs |
| Hopkinton | 2,651 | $201,094 | 1ZIPs |
| Pepperell | 2,390 | $76,726 | 1ZIPs |
| Shirley | 1,611 | $108,494 | 1ZIPs |
| Hanscom AFB | 1,516 | $104,688 | 1ZIPs |
| Groton | 1,353 | $135,714 | 3ZIPs |
| Townsend | 1,213 | $58,571 | 1ZIPs |
| Acton | — | — | 2ZIPs |
| Ashby | — | — | 1ZIPs |
| Ashland | — | — | 1ZIPs |
| Auburndale | — | — | 1ZIPs |
| Bedford | — | — | 1ZIPs |
| Billerica | — | — | 2ZIPs |
| Boxborough | — | — | 1ZIPs |
| Carlisle | — | — | 1ZIPs |
| Chelmsford | — | — | 1ZIPs |
| Concord | — | — | 1ZIPs |
| Dracut | — | — | 1ZIPs |
| Dunstable | — | — | 1ZIPs |
| Holliston | — | — | 1ZIPs |
| Lincoln | — | — | 1ZIPs |
| Littleton | — | — | 1ZIPs |
| Natick | — | — | 1ZIPs |
| Newton Center | — | — | 1ZIPs |
| Newton Highlands | — | — | 1ZIPs |
| Newton Lower Falls | — | — | 1ZIPs |
| Newton Upper Falls | — | — | 1ZIPs |
| Newtonville | — | — | 1ZIPs |
| North Billerica | — | — | 1ZIPs |
| North Chelmsford | — | — | 1ZIPs |
| North Reading | — | — | 2ZIPs |
| Sherborn | — | — | 1ZIPs |
| Stow | — | — | 1ZIPs |
| Sudbury | — | — | 1ZIPs |
| Tewksbury | — | — | 1ZIPs |
| Tyngsboro | — | — | 1ZIPs |
| Waban | — | — | 1ZIPs |
| Watertown | — | $126,265 | 3ZIPs |
| Wayland | — | — | 1ZIPs |
| West Newton | — | — | 1ZIPs |
| West Townsend | — | — | 1ZIPs |
| Westford | — | — | 1ZIPs |
| Weston | — | — | 1ZIPs |
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in Middlesex County
Review the most populated postal areas across Middlesex County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
| ZIP | City | Median incomeHousehold | Population (ZIP) |
|---|---|---|---|
| 01431 | Ashby | — | — |
| 01432 | Ayer | — | — |
| 01450 | Groton | — | — |
| 01460 | Littleton | — | — |
| 01463 | Pepperell | — | — |
| 01464 | Shirley | — | — |
| 01469 | Townsend | — | — |
| 01470 | Groton | — | — |
| 01471 | Groton | — | — |
| 01474 | West Townsend | — | — |
| 01701 | Framingham | — | — |
| 01702 | Framingham | — | — |
| 01703 | Framingham | — | — |
| 01704 | Framingham | — | — |
| 01705 | Framingham | — | — |
| 01718 | Acton | — | — |
| 01719 | Boxborough | — | — |
| 01720 | Acton | — | — |
| 01721 | Ashland | — | — |
| 01730 | Bedford | — | — |
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS