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ZIP Code 02138
Cambridge, MA, Middlesex County
Population
38,509
Land area
2.7sq mi
People per sq mi
14,063
City
Cambridge
ZIP 02138 and nearby ZIP codes
ZIP 02138 at a glance
- ZIP 02138 (Cambridge) is about 16 times as dense as Massachusetts as a whole.
- The median household income is $119,967, 15% above the Massachusetts median of $103,960.
- A typical owner-occupied home is valued at $1,212,400 (about 2.2 times the Massachusetts figure) and median rent is $2,772 a month.
Local data for ZIP 02138
Counts from official public data
Housing and community stats
ZIP 02138, American Community Survey 2020-2024
Median household income
$119,967
Poverty rate
13.5%
Median home value
$1,212,400
Prices +3.7% in a year
Median rent
$2,772/mo
Homeownership
41.9%
Bachelor's or higher
85.6%
Median age
28.3
Average commute
23.6 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
1,072
ZIP Business Patterns 2023
Employees
46,771
$3.7B annual payroll
PPP loans
$150M
1,168 loans
Campaign donations
$10.1M
31% D, 0% R, 2026 cycle
Environment and hazard risk
ZIP 02138, from FEMA, NOAA and EPA
Natural hazard risk
Relatively High
Top: ice storm
Storm events since 1996
1,840
Countywide, mostly thunderstorm wind
Flood insurance policies
4,000
1.0% of homes, county
July high / Jan low
85° / 19°F
49.4 inches of rain a year
Health statistics
Share of adults in ZIP 02138, CDC PLACES estimates
Obesity
21.0%
U.S. 33.3% -12.3 pts
Diabetes
5.6%
U.S. 12.1% -6.5 pts
Smoking
6.6%
U.S. 12.8% -6.2 pts
Uninsured (18-64)
3.6%
U.S. 11.1% -7.5 pts
Frequently asked questions
- What city is ZIP code 02138?
- ZIP code 02138 is in Cambridge, MA (Middlesex County).
- What county is ZIP code 02138 in?
- ZIP code 02138 is mostly in Middlesex County, Massachusetts.
- How many people live in ZIP code 02138?
- About 38,509 people live in the 02138 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.