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US ZIP Code Profile

ZIP Code 02109
Boston, Massachusetts

ZIP code 02109 is in Boston, located in Suffolk County, Massachusetts, within the Boston-Cambridge-Newton metro area. Its 2020 Census population was 3,921. The estimated median adjusted gross income per tax return is $98,929, and about 26% of filers report $200,000 or more.

2020 Population
3,921
Census ZCTA
County
Suffolk
FIPS 25025
Median income (est.)
$98,929
IRS SOI 2022
Land Area
0.173 mi²
+ 0.114 mi² water

01Location & Geography

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

Primary CityBoston, MA
CountySuffolk County (FIPS 25025)
StateMassachusetts (FIPS 25)
Metro Area (MSA)Boston-Cambridge-Newton, MA-NH Metro Area (14460)
Census Region / DivisionNortheast Region · New England Division
Coordinates42.36699, -71.050545
Land / Water Area0.173 mi² land · 0.114 mi² water

02Income & Economics

Distribution of the 2,630 individual tax returns filed in 02109 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
12.6%
$25K–$50K
10.7%
$50K–$75K
14.1%
$75K–$100K
13.3%
$100K–$200K
23.6%
$200K+
25.9%
The $200,000+ bracket accounts for 87% of 02109's total adjusted gross income, from 26% of returns — a concentration that drives the gap between the median ($98,929) 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 02109's IRS income metrics, 2020–2022.

Median income (2021→2022)
$98,929
▼ 10.2%
Filers earning $200K+
25.9%
▼ 3.9 pt
Total filers
2,630
▲ 0.4%
GET /zipc/v2/zipcodes/02109/soi?year=… $97K 2020 $110K 2021 $99K 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 02109 ZCTA.

2000
3,428
 
2010
3,771
▲ +10.0%
2020
3,921
▲ +4.0%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 02109. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 02109

Boston and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 02109 to any ZIP

Enter a 5-digit ZIP to calculate the distance.

06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number240799
City AliasesBoston

07Frequently Asked Questions

What county is ZIP code 02109 in?

ZIP code 02109 is in Suffolk County, Massachusetts (county FIPS code 25025).

What city is ZIP code 02109?

The primary USPS city for 02109 is Boston, MA.

What metro area (MSA) is 02109 in?

02109 is part of the Boston-Cambridge-Newton, MA-NH Metro Area (MSA code 14460).

What is the population of ZIP code 02109?

The 2020 Census population of 02109 was 3,921 residents.

What is the median income in ZIP code 02109?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 02109 is about $98,929, with around 26% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.