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US ZIP Code Profile

ZIP Code 01904
Lynn, Massachusetts

ZIP code 01904 is in Lynn, located in Essex County, Massachusetts, within the Boston-Cambridge-Newton metro area. Its 2020 Census population was 19,944. The estimated median adjusted gross income per tax return is $55,897, and about 5% of filers report $200,000 or more.

2020 Population
19,944
Census ZCTA
County
Essex
FIPS 25009
Median income (est.)
$55,897
IRS SOI 2022
Land Area
4.519 mi²
+ 0.503 mi² water

01Location & Geography

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

Primary CityLynn, MA
CountyEssex County (FIPS 25009)
StateMassachusetts (FIPS 25)
Metro Area (MSA)Boston-Cambridge-Newton, MA-NH Metro Area (14460)
Census Region / DivisionNortheast Region · New England Division
Coordinates42.492455, -70.97393
Land / Water Area4.519 mi² land · 0.503 mi² water

02Income & Economics

Distribution of the 11,180 individual tax returns filed in 01904 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
24.8%
$25K–$50K
21.1%
$50K–$75K
17.4%
$75K–$100K
12.1%
$100K–$200K
20.0%
$200K+
4.6%
The $200,000+ bracket accounts for 19% of 01904's total adjusted gross income, from 5% of returns — a concentration that drives the gap between the median ($55,897) 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 01904's IRS income metrics, 2020–2022.

Median income (2021→2022)
$55,897
▲ 6.3%
Filers earning $200K+
4.6%
▲ 0.6 pt
Total filers
11,180
▲ 1.6%
GET /zipc/v2/zipcodes/01904/soi?year=… $49K 2020 $53K 2021 $56K 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 01904 ZCTA.

2000
17,818
 
2010
18,203
▲ +2.2%
2020
19,944
▲ +9.6%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 01904. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 01904

Lynn and its immediate neighbors, sorted by distance.

3 mi
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Distance from 01904 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 Number244199
City AliasesEast Lynn, Lynn

07Frequently Asked Questions

What county is ZIP code 01904 in?

ZIP code 01904 is in Essex County, Massachusetts (county FIPS code 25009).

What city is ZIP code 01904?

The primary USPS city for 01904 is Lynn, MA.

What metro area (MSA) is 01904 in?

01904 is part of the Boston-Cambridge-Newton, MA-NH Metro Area (MSA code 14460).

What is the population of ZIP code 01904?

The 2020 Census population of 01904 was 19,944 residents.

What is the median income in ZIP code 01904?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 01904 is about $55,897, with around 5% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.