Zip Code 02139
Cambridge, Massachusetts — Middlesex County
📍 ZIP code 02139 is in Cambridge, Middlesex County, Massachusetts.
ZIP code 02139 is located in Cambridge, Middlesex County, Massachusetts. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 39,609. The area code for ZIP code 02139 is 617.
Quick Answer
Zip code 02139 is in Cambridge, Massachusetts (Middlesex County). It has a population of 39,609, median household income of $124,648, and median home value of $1,066,200.
Population
39,609
Income
$124,648
Home Value
$1,066,200
Climate
85°F / 19°F
About Zip Code 02139
Zip code 02139 is located in Cambridge, Massachusetts, within Middlesex County. Home to approximately 39,609 residents, this area sits at an elevation of 10 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 617.
The median household income is $124,648 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $1,066,200, and the cost of living index is 250 (150% above the national average of 100).
Summers average a high of 85°F while winters drop to 19°F. The area receives about 49 in of rain and 32 in of snow annually. The zip code covers 1.6 square miles of land area and 0.1 square miles of water.
Key Statistics
39,609
$124,648
$1,066,200
Eastern (EST/EDT)
617
10 ft
1.6 sq mi
29.9
16,930
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Compare With Nearby Zip Codes
| Metric | 02139 | 02163 | 02215 | 02142 | 02141 | 02143 |
|---|---|---|---|---|---|---|
| City | Cambridge, MA | Cambridge, MA | Boston, MA | Cambridge, MA | Cambridge, MA | Chelsea, MA |
| Population | 39,609 | 1,852 | 24,054 | 4,349 | 14,677 | 25,161 |
| Median Income | $124,648 | $74,028 | $65,827 | $168,788 | $120,542 | $126,102 |
| Home Value | $1,066,200 | $0 | $683,800 | $1,726,900 | $892,600 | $930,200 |
| Cost of Living | 250 | 96 | 184 | 250 | 244 | 247 |
| Median Age | 29.9 | 22.4 | 21.9 | 31.8 | 30.9 | 32.8 |
Cost of Living
100 = National Average. Cambridge's cost of living is 150% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
8.6x
Demographics
Zip code 02139 has a population of 39,609 people with a median age of 29.9. There are 16,930 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Cambridge (02139) population trend from 2010 to 2024
↓ -15.8%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
85°F
19°F
49 in
32 in
Cambridge experiences warm summers with average highs around 85°F. Winters are cold with lows averaging 19°F. With 32 in of annual snowfall, residents should be prepared for significant winter weather.
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Housing & Economy
Median Home Value
$1,066,200
Median Household Income
$124,648
With 16,930 housing units across 1.6 square miles, 02139 has a housing density of 10,581 units per square mile. The home price-to-income ratio is 8.6x.
Location & Geography
Latitude
42.3630°
Longitude
-71.1034°
Land Area
1.6 sq mi
Water Area
0.1 sq mi
Nearby Zip Codes
Zip codes closest to 02139 (Cambridge, MA) with distances:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 02139's $124,648. A way to compare Cambridge to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 02139 (Cambridge, MA). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Cambridge, Massachusetts?
Cambridge, Massachusetts uses zip code 02139.
What county is zip code 02139 in?
Zip code 02139 is located in Middlesex County, Massachusetts.
What is the population of zip code 02139?
The population of zip code 02139 is 39,609 with a median age of 29.9.
Is 02139 in Cambridge, Massachusetts?
Yes, zip code 02139 is in Cambridge, Middlesex County, Massachusetts. The area code is 617.
Frequently Asked Questions
What city is zip code 02139 in?
Zip code 02139 is in Cambridge, Massachusetts. It is part of Middlesex County and uses the Eastern (EST/EDT) timezone.
What is zip code 02139?
Zip code 02139 is a U.S. postal code in Cambridge, Massachusetts (Middlesex County). It has a population of 39,609 and covers 1.6 square miles.
What is the population of zip code 02139?
The population of zip code 02139 (Cambridge, MA) is 39,609 with a median age of 29.9. There are approximately 16,930 housing units in this area.
What is the median income in zip code 02139?
The median household income in zip code 02139 (Cambridge, MA) is $124,648 per year. The cost of living index is 250 (100 = national average).
What is the average home price in zip code 02139?
The median home value in zip code 02139 (Cambridge, MA) is $1,066,200. The cost of living index is 250 compared to the national average of 100.
What county is zip code 02139 in?
Zip code 02139 is located in Middlesex County, Massachusetts. The primary city is Cambridge.
What is the area code for zip code 02139?
Zip code 02139 in Cambridge, MA uses area code 617. It is located in the Eastern (EST/EDT) timezone.
Is zip code 02139 a good place to live?
Zip code 02139 (Cambridge, MA) has a cost of living index of 250 (100 = national average), a median household income of $124,648, and median home values of $1,066,200. The median age is 29.9. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 02139?
The cost of living index for zip code 02139 (Cambridge, MA) is 250, where 100 represents the national average. This area is above the national average. Median home value: $1,066,200.
What schools serve zip code 02139?
Zip code 02139 in Cambridge, Massachusetts is served by the local school district of Middlesex County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.