Residential delivery area · Massachusetts
ZIP Code 01904: Lynn, MA
ZIP code 01904 is in Lynn, Massachusetts, entirely in Essex County (Census 2020 ZIP-county file). About 21,000 people live there (Census Bureau, ACS 2020-2024), the 3rd most populous of Lynn's 4 residential ZIP codes. Median household income is $99,614 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Lynn · 4 residential ZIPs
- County
- Essex County
- Census places
- Lynn
- Metro area
- Boston-Cambridge-Newton, MA-NH
- House district
- MA-6 119th Congress
- State
- Massachusetts
- Time zone
- Eastern
- Land area
- 4.2 sq mi · 4,948 people per sq mi
Where is ZIP code 01904?
01904 centers on 42.491°, -70.971° and covers 4.2 square miles of land plus 0.5 of water. It borders 6 ZIP codes: 01905, 01902, 01906, 01960, 01940, 01970.
The map draws ZIP code areas only. For the streets inside 01904, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 01904 compare with the rest of Lynn?
| Measure | 01904 | In Lynn | In Essex County | In MA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 21,003 | 3rd of 4 | 16th of 44 | 121st of 539 |
| Median household income | $100k | 1st of 3 | 27th of 39 | 261st of 406 |
| Median home value | $561k | 1st of 3 | 28th of 40 | 209th of 449 |
Its median household income is higher than in 81% of U.S. residential ZIP codes, and it is denser than 94% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 01904?
The 2020 Census counted 19,944 people in 01904; the ACS, which samples households over 2020-2024, estimates 21,003. Between the 2010 and 2020 censuses its population grew 9.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 21,003
- 2020 Census count
- 19,944+9.6% since 2010 (18,203)
- Households
- 7,169
- Median age
- 40.9
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 01904?
Of the 21,003 people the ACS estimates in 01904, 22.0% are under 18 and 17.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (52.0%), then Hispanic or Latino (33.3%).
- Under 1822.0%
- 18 to 6460.5%
- 65 and older17.5%
- White, not Hispanic52.0%
- Hispanic or Latino33.3%
- Asian, not Hispanic5.9%
- Black, not Hispanic4.8%
- Other or two or more4.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 01904 earn?
Median household income is $99,614 (ACS 2020-2024), the 27th highest of the 39 ranked ZIP codes in Essex County. It is not measurably different from 2015-2019 ($100,353 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $99,614
- Income per person
- $42,883
- Below the poverty line
- 7.0%
- Unemployed (of the labor force)
- 4.6%
- Adults 25+ with a bachelor's degree
- 33.1%
- Adjusted gross income per tax return, 2022
- $73,16811,180 returns; wages 77% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 01904?
FHFA's house price index for 01904, built from repeat sales and appraisals of the same homes, rose 112% from 2015 to 2025 and rose 48% from 2020 to 2025, and moved +3.4% in 2025.
- Median home value (owners' estimate)
- $560,500
- Median gross rent
- $1,822
- Homes owned by their occupants
- 82.4%
- Housing units
- 7,494
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 01904?
333 business establishments had a location in this ZIP code in 2023, 21 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction78
- Administrative and support and waste management and remediation services51
- Health care and social assistance46
- Retail trade41
- Other services (except public administration)38
- Accommodation and food services30
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 01904?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 01905 | Lynn | 28,221 | $84k | 2.0 mi |
| 01902 | Lynn | 50,066 | $67k | 2.1 mi |
| 01906 | Saugus | 28,773 | $102k | 2.6 mi |
| 01960 | Peabody | 54,474 | $97k | 3.0 mi |
| 01940 | Lynnfield | 13,285 | $173k | 4.5 mi |
| 01970 | Salem | 44,738 | $85k | 5.9 mi |
| 01901 | Lynn | 2,419 | $36k | 2.5 mi (near) |
| 01907 | Swampscott | 15,277 | $134k | 3.5 mi (near) |
| 01880 | Wakefield | 27,793 | $134k | 4.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.