Residential delivery area · Massachusetts
ZIP Code 02420: Lexington, MA
ZIP code 02420 is in Lexington, Massachusetts, entirely in Middlesex County (Census 2020 ZIP-county file). About 16,000 people live there (Census Bureau, ACS 2020-2024), the less populous of Lexington's 2 residential ZIP codes. Median household income is $245,031 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Lexington (94%) and Burlington (6%).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Lexington · 2 residential ZIPs
- County
- Middlesex County
- Census places
- Lexington (94%) census-designated place; Burlington (6%) census-designated place
- Metro area
- Boston-Cambridge-Newton, MA-NH
- House districts
- MA-5 (94%), MA-6 (6%) 119th Congress, by share of land
- State
- Massachusetts
- Time zone
- Eastern
- Land area
- 7.0 sq mi · 2,304 people per sq mi
Where is ZIP code 02420?
02420 centers on 42.459°, -71.218° and covers 7.0 square miles of land plus 0.0 of water. It borders 7 ZIP codes: 02421, 01803, 02476, 01890, 01801, 02474, 01730.
The map draws ZIP code areas only. For the streets inside 02420, 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 02420 compare with the rest of Lexington?
| Measure | 02420 | In Lexington | In Middlesex County | In MA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 16,215 | 2nd of 2 | 46th of 83 | 169th of 539 |
| Median household income | $245k | 1st of 2 | 5th of 78 | 7th of 406 |
| Median home value | $1.2M | 2nd of 2 | 14th of 80 | 24th of 449 |
Its median household income is higher than in more than 99% of U.S. residential ZIP codes, and it is denser than 86% 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 02420?
The 2020 Census counted 15,502 people in 02420; the ACS, which samples households over 2020-2024, estimates 16,215. Between the 2010 and 2020 censuses its population grew 10.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 16,215
- 2020 Census count
- 15,502+10.3% since 2010 (14,052)
- Households
- 5,653
- Median age
- 45.9
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 02420?
Of the 16,215 people the ACS estimates in 02420, 25.6% are under 18 and 20.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (55.9%), then Asian (not Hispanic) (31.7%).
- Under 1825.6%
- 18 to 6453.9%
- 65 and older20.4%
- White, not Hispanic55.9%
- Asian, not Hispanic31.7%
- Other or two or more6.3%
- Hispanic or Latino4.0%
- Black, not Hispanic2.1%
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 02420 earn?
Median household income is $245,031 (ACS 2020-2024), the 5th highest of the 78 ranked ZIP codes in Middlesex County. It is not measurably different from 2015-2019 ($239,869 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $245,031
- Income per person
- $117,095
- Below the poverty line
- 2.8%
- Unemployed (of the labor force)
- 3.5%
- Adults 25+ with a bachelor's degree
- 85.6%
- Adjusted gross income per tax return, 2022
- $352,8957,170 returns; wages 60% 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 02420?
FHFA's house price index for 02420, built from repeat sales and appraisals of the same homes, rose 66% from 2015 to 2025 and rose 39% from 2020 to 2025, and moved +14.4% in 2025.
- Median home value (owners' estimate)
- $1,200,300
- Median gross rent
- $2,801
- Homes owned by their occupants
- 86.0%
- Housing units
- 5,851
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 02420?
504 business establishments had a location in this ZIP code in 2023, 10 fewer than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance98
- Professional, scientific, and technical services86
- Other services (except public administration)60
- Retail trade47
- Accommodation and food services47
- Finance and insurance34
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 02420?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 02421 | Lexington | 18,080 | $228k | 1.8 mi |
| 01803 | Burlington | 26,274 | $146k | 3.2 mi |
| 02476 | Arlington | 17,708 | $151k | 3.7 mi |
| 01890 | Winchester | 23,406 | $230k | 3.8 mi |
| 01801 | Woburn | 41,939 | $111k | 3.8 mi |
| 02474 | Arlington | 28,642 | $151k | 4.1 mi |
| 01730 | Bedford | 14,707 | $172k | 4.3 mi |
| 01731 | Hanscom Afb | 2,110 | $105k | 3.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.