Residential delivery area · Massachusetts
ZIP Code 01940: Lynnfield, MA
ZIP code 01940 is in Lynnfield, Massachusetts, entirely in Essex County (Census 2020 ZIP-county file). About 13,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $173,214 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Lynnfield · its only residential ZIP
- County
- Essex County
- Census places
- Lynnfield census-designated place
- Metro area
- Boston-Cambridge-Newton, MA-NH
- House district
- MA-6 119th Congress
- State
- Massachusetts
- Time zone
- Eastern
- Land area
- 10.1 sq mi · 1,318 people per sq mi
Where is ZIP code 01940?
01940 centers on 42.534°, -71.038° and covers 10.1 square miles of land plus 0.6 of water. It borders 7 ZIP codes: 01880, 01867, 01960, 01864, 01904, 01906, 01949.
The map draws ZIP code areas only. For the streets inside 01940, 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 01940 compare with the rest of Essex County?
| Measure | 01940 | In Essex County | In MA |
|---|---|---|---|
| People (ACS 2020-2024) | 13,285 | 23rd of 44 | 209th of 539 |
| Median household income | $173k | 7th of 39 | 49th of 406 |
| Median home value | $905k | 3rd of 40 | 59th of 449 |
Its median household income is higher than in 98% of U.S. residential ZIP codes, and it is denser than 81% 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 01940?
The 2020 Census counted 13,326 people in 01940; the ACS, which samples households over 2020-2024, estimates 13,285. Between the 2010 and 2020 censuses its population grew 10.1% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 13,285
- 2020 Census count
- 13,326+10.1% since 2010 (12,108)
- Households
- 4,650
- Median age
- 41.9
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 01940?
Of the 13,285 people the ACS estimates in 01940, 27.6% are under 18 and 18.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (81.4%).
- Under 1827.6%
- 18 to 6454.0%
- 65 and older18.4%
- White, not Hispanic81.4%
- Asian, not Hispanic6.8%
- Hispanic or Latino5.5%
- Other or two or more5.2%
- Black, not Hispanic1.0%
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 01940 earn?
Median household income is $173,214 (ACS 2020-2024), the 7th highest of the 39 ranked ZIP codes in Essex County. It is not measurably different from 2015-2019 ($146,750 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $173,214±$23,903
- Income per person
- $78,738
- Below the poverty line
- 5.9%
- Unemployed (of the labor force)
- 2.9%
- Adults 25+ with a bachelor's degree
- 62.7%
- Adjusted gross income per tax return, 2022
- $220,5206,690 returns; wages 55% 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 01940?
FHFA's house price index for 01940, built from repeat sales and appraisals of the same homes, rose 72% from 2015 to 2025 and rose 41% from 2020 to 2025, and moved +6.8% in 2025.
- Median home value (owners' estimate)
- $905,400
- Median gross rent
- $2,676
- Homes owned by their occupants
- 87.7%
- Housing units
- 4,815
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 01940?
461 business establishments had a location in this ZIP code in 2023, 55 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services82
- Retail trade69
- Construction50
- Health care and social assistance43
- Finance and insurance37
- Accommodation and food services35
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 01940?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 01880 | Wakefield | 27,793 | $134k | 2.4 mi |
| 01867 | Reading | 25,612 | $166k | 3.4 mi |
| 01960 | Peabody | 54,474 | $97k | 3.5 mi |
| 01864 | North Reading | 15,765 | $148k | 3.9 mi |
| 01904 | Lynn | 21,003 | $100k | 4.5 mi |
| 01906 | Saugus | 28,773 | $102k | 4.6 mi |
| 01949 | Middleton | 9,816 | $167k | 5.5 mi |
| 01937 | Hathorne | 107 | – | 4.5 mi (near) |
| 02180 | Stoneham | 23,355 | $114k | 5.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.