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US ZIP Code Profile

ZIP Code 02140
Cambridge, Massachusetts

ZIP code 02140 is in Cambridge, located in Middlesex County, Massachusetts, within the Boston-Cambridge-Newton metro area. Its 2020 Census population was 21,447. The estimated median adjusted gross income per tax return is $77,441, and about 17% of filers report $200,000 or more.

2020 Population
21,447
Census ZCTA
County
Middlesex
FIPS 25017
Median income (est.)
$77,441
IRS SOI 2022
Land Area
1.155 mi²
+ 0.021 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityCambridge, MA
CountyMiddlesex County (FIPS 25017)
StateMassachusetts (FIPS 25)
Metro Area (MSA)Boston-Cambridge-Newton, MA-NH Metro Area (14460)
Census Region / DivisionNortheast Region · New England Division
Coordinates42.39216, -71.133995
Land / Water Area1.155 mi² land · 0.021 mi² water

02Income & Economics

Distribution of the 11,070 individual tax returns filed in 02140 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
16.9%
$25K–$50K
16.2%
$50K–$75K
15.8%
$75K–$100K
11.6%
$100K–$200K
22.2%
$200K+
17.3%
The $200,000+ bracket accounts for 60% of 02140's total adjusted gross income, from 17% of returns — a concentration that drives the gap between the median ($77,441) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 02140's IRS income metrics, 2020–2022.

Median income (2021→2022)
$77,441
▲ 6.4%
Filers earning $200K+
17.3%
▲ 0.4 pt
Total filers
11,070
▲ 2.1%
GET /zipc/v2/zipcodes/02140/soi?year=… $67K 2020 $73K 2021 $77K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 02140 ZCTA.

2000
17,003
 
2010
17,607
▲ +3.6%
2020
21,447
▲ +21.8%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 02140. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 02140

Cambridge and its immediate neighbors, sorted by distance.

3 mi
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Distance from 02140 to any ZIP

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06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortB
USPS Finance Number241065
City AliasesCambridge, N Cambridge, North Cambridge, Porter Square

07Frequently Asked Questions

What county is ZIP code 02140 in?

ZIP code 02140 is in Middlesex County, Massachusetts (county FIPS code 25017).

What city is ZIP code 02140?

The primary USPS city for 02140 is Cambridge, MA.

What metro area (MSA) is 02140 in?

02140 is part of the Boston-Cambridge-Newton, MA-NH Metro Area (MSA code 14460).

What is the population of ZIP code 02140?

The 2020 Census population of 02140 was 21,447 residents.

What is the median income in ZIP code 02140?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 02140 is about $77,441, with around 17% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.