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Where am ILOCATED

What County Is Boston, Massachusetts In?

Boston is in Suffolk County, Massachusetts. It is the county seat of Suffolk County. About 666,442 people live there (2020–2024 estimate). It uses Eastern Time and covers 48.3 sq mi (125 km²) of land. The nearest larger city or town is New York, New York, 190 mi southwest.

WorcesterSpringfieldCambridge
Boston in Massachusetts
BrooklineCambridgeChelseaDedhamHullMiltonQuincySomervilleWinthrop Town
Boston and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Population, 2020–2024 estimate
666,442 ± 55
Land area
48.3 sq mi (125 km²)
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Sun today
Sunrise and sunset for the year
Elevation
5 ft 2 m, ground height at the central point
Median household income
$97,344 ± $1,837
Median home value
$731,700 ± $9,717
Median rent, with utilities
$2,147 ± $25
Homes lived in by their owners
35.7% ± 0.8 points
Metro area
Boston-Cambridge-Newton, MA-NHA principal city of the area
Water area
41.3 sq mi (107 km²)
State
Massachusetts
Census place code
2507000
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. Population, 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.

County boundaries in Boston

For a point close to the city or county boundary, check the address with the office responsible for your form. Check a point on the county map.

Coordinates of Boston

42.338551, -71.018253 is a central point for Boston, not a street address. Convert these coordinates or share a map link.

Elevation in Boston

5 ft (2 m), the USGS ground height at Boston’s central point (3DEP terrain, 1 m grid, NAVD 88). Ground height varies across town. Check elevation at another spot.

Sunrise and sunset in Boston

Longest day
15 hours 17 minutes around June 21
Shortest day
9 hours 5 minutes around December 21
Earliest sunrise
5:06 AM around June 15
Latest sunrise
7:23 AM the day before clocks go back in November
Earliest sunset
4:11 PM around December 9
Latest sunset
8:24 PM around June 27

Clocks go forward an hour on the second Sunday in March and back on the first Sunday in November, so sunrise and sunset jump an hour later in March and an hour earlier in November.

Sunrise and sunset on the 15th of each month
DaySunriseSunsetDaylight
Jan 157:10 AM4:36 PM9 h 26 min
Feb 156:40 AM5:16 PM10 h 36 min
Mar 156:56 AM6:50 PM11 h 54 min
Apr 156:03 AM7:25 PM13 h 22 min
May 155:22 AM7:58 PM14 h 36 min
Jun 155:06 AM8:22 PM15 h 16 min
Jul 155:20 AM8:19 PM14 h 59 min
Aug 155:51 AM7:45 PM13 h 54 min
Sep 156:23 AM6:54 PM12 h 31 min
Oct 156:56 AM6:02 PM11 h 6 min
Nov 156:34 AM4:22 PM9 h 48 min
Dec 157:06 AM4:12 PM9 h 6 min

Approximate times for a flat horizon at the central point; the days move by a day or so from year to year. Hills and weather can change what you see.

Time zones in Boston

Boston uses Eastern Time (America/New_York).

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. 0212456,216 people
  2. 0212843,345 people
  3. 0213543,149 people
  4. 0213040,055 people
  5. 0213637,265 people
  6. 0212736,769 people
  7. 0212533,662 people
  8. 0244631,310 people
  9. 0213131,151 people
  10. 0211529,705 people
  11. 0212129,040 people
  12. 0211828,946 people
All 35
  1. 0211927,377 people
  2. 0212626,583 people
  3. 0213226,444 people
  4. 0221524,581 people
  5. 0212223,479 people
  6. 0246723,001 people
  7. 0244522,560 people
  8. 0211621,978 people
  9. 0212920,032 people
  10. 0213417,667 people
  11. 0212015,283 people
  12. 0211414,418 people
  13. 021118,407 people
  14. 022106,971 people
  15. 021136,385 people
  16. 021083,794 people
  17. 021093,612 people
  18. 021102,342 people
  19. 021631,817 people
  20. 021991,292 people
  21. 0213362 people
  22. 022030 people
  23. 022050 people

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

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Winthrop Town, Massachusetts (city)3.5 mi northeast
  2. Chelsea, Massachusetts (city)4.1 mi north
  3. Everett, Massachusetts (city)5.0 mi north
  4. Quincy, Massachusetts (city)5.4 mi south
  5. Somerville, Massachusetts (city)5.5 mi northwest
  6. Cambridge, Massachusetts (city)5.7 mi northwest
  7. Revere, Massachusetts (city)5.9 mi north
  8. Brookline, Massachusetts (CDP)6.4 mi west
  9. Hull, Massachusetts (CDP)6.9 mi east
  10. Nahant, Massachusetts (CDP)7.0 mi northeast
  11. Milton, Massachusetts (CDP)7.5 mi southwest
  12. Watertown, Massachusetts (city)8.4 mi west
All 15
  1. Newton, Massachusetts (city)9.7 mi west
  2. Dedham, Massachusetts (CDP)10 mi southwest
  3. Needham, Massachusetts (CDP)12 mi west

Before using this answer on a form

A city boundary, a CDP and a mailing city can mean different things.

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

See this place 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.