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Where am ILOCATED

Suffolk County, Massachusetts

Suffolk County, Massachusetts, has 791,891 residents (July 2025 estimate). Its county seat is Boston. It uses Eastern Time and covers 58.3 sq mi (151 km²) of land.

WorcesterSpringfield
Suffolk County in Massachusetts
BostonRevereChelseaWinthrop Town
Suffolk County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
791,891
Land area
58.3 sq mi (151 km²)
County seat or government
Boston
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income
$95,631 ± $1,765
Median home value
$705,800 ± $8,139
Median rent, with utilities
$2,129 ± $24
Homes lived in by their owners
36.5% ± 0.7 points
County type
County
Metro or micro area
Boston-Cambridge-Newton, MA-NH metro areaCentral county
Water area
62 sq mi (160 km²)
State
Massachusetts
County code (FIPS)
25025
Coordinates (central point)
42.338551, -71.018253
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Suffolk County

Time zoneLocal time and UTC offsetNext clock change
Eastern TimeAmerica/New_YorkUTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 0215160,012 people
  2. 0212456,216 people
  3. 0214950,045 people
  4. 0212843,345 people
  5. 0213543,149 people
  6. 0213040,055 people
  7. 0215039,908 people
  8. 0213637,265 people
  9. 0212736,769 people
  10. 0212533,662 people
  11. 0244631,310 people
  12. 0213131,151 people
All 39
  1. 0211529,705 people
  2. 0212129,040 people
  3. 0211828,946 people
  4. 0211927,377 people
  5. 0212626,583 people
  6. 0213226,444 people
  7. 0221524,581 people
  8. 0212223,479 people
  9. 0246723,001 people
  10. 0244522,560 people
  11. 0211621,978 people
  12. 0212920,032 people
  13. 0215218,759 people
  14. 0213417,667 people
  15. 0212015,283 people
  16. 0211414,418 people
  17. 021118,407 people
  18. 022106,971 people
  19. 021136,385 people
  20. 021083,794 people
  21. 021093,612 people
  22. 021102,342 people
  23. 021631,817 people
  24. 021991,292 people
  25. 0213362 people
  26. 022030 people
  27. 022050 people

39 ZIP Code areas overlap Suffolk County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

School districts in Suffolk County, largest first

  1. Boston School District666,442 people
  2. Revere School District60,012 people
  3. Chelsea School District39,908 people
  4. Winthrop School District18,759 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Boston, Massachusetts (city)666,442 people
  2. Revere, Massachusetts (city)60,012 people
  3. Chelsea, Massachusetts (city)39,908 people
  4. Winthrop Town, Massachusetts (city)18,759 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Norfolk County, Massachusetts14 mi southwest
  2. Middlesex County, Massachusetts22 mi northwest
  3. Essex County, Massachusetts22 mi north
  4. Plymouth County, Massachusetts28 mi southeast

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.