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US ZIP Code Profile

ZIP Code 02478
Belmont, Massachusetts

ZIP code 02478 is in Belmont, located in Middlesex County, Massachusetts, within the Boston-Cambridge-Newton metro area. Its 2020 Census population was 27,286. The estimated median adjusted gross income per tax return is $110,266, and about 32% of filers report $200,000 or more.

2020 Population
27,286
Census ZCTA
County
Middlesex
FIPS 25017
Median income (est.)
$110,266
IRS SOI 2022
Land Area
4.643 mi²
+ 0.071 mi² water

01Location & Geography

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

Primary CityBelmont, 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
Coordinates42.395317, -71.18028
Land / Water Area4.643 mi² land · 0.071 mi² water

02Income & Economics

Distribution of the 12,920 individual tax returns filed in 02478 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
18.7%
$25K–$50K
10.1%
$50K–$75K
10.4%
$75K–$100K
8.6%
$100K–$200K
20.4%
$200K+
31.7%
The $200,000+ bracket accounts for 81% of 02478's total adjusted gross income, from 32% of returns — a concentration that drives the gap between the median ($110,266) 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 02478's IRS income metrics, 2020–2022.

Median income (2021→2022)
$110,266
▲ 6.3%
Filers earning $200K+
31.7%
▲ 0.9 pt
Total filers
12,920
▲ 1.7%
GET /zipc/v2/zipcodes/02478/soi?year=… $94K 2020 $104K 2021 $110K 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 02478 ZCTA.

2000
24,158
 
2010
24,664
▲ +2.1%
2020
27,286
▲ +10.6%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 02478. Powered by the same radius endpoint developers call from the API.

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ZIP codes within range of 02478

Belmont and its immediate neighbors, sorted by distance.

3 mi
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Distance from 02478 to any ZIP

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06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypeBranch
Carrier Route SortB
USPS Finance Number240002
City AliasesBelmont

07Frequently Asked Questions

What county is ZIP code 02478 in?

ZIP code 02478 is in Middlesex County, Massachusetts (county FIPS code 25017).

What city is ZIP code 02478?

The primary USPS city for 02478 is Belmont, MA.

What metro area (MSA) is 02478 in?

02478 is part of the Boston-Cambridge-Newton, MA-NH Metro Area (MSA code 14460).

What is the population of ZIP code 02478?

The 2020 Census population of 02478 was 27,286 residents.

What is the median income in ZIP code 02478?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 02478 is about $110,266, with around 32% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.