ZIP code · Lexington · Massachusetts · United States
ZIP code 02421 — Lexington
ZIP code 02421 serves Lexington, Massachusetts.
- Postal code
- 02421Single source Value from one source, not cross-checked.
- City
- Lexington
- County
- Middlesex FIPS 25017
- State
- Massachusetts
- Country
- United States
- Coordinates
- 42.4426, -71.2265 — precision precise (locality)
View on OpenStreetMap - Population
- 17,798 (ZCTA, ACS 5-year)
- Population density
- 1,859 / sq mi
- Land area
- 9.6 sq mi (24.8 km²) (ZCTA, ACS 5-year)
- Median household income
- $212,843
- Per-capita income
- $109,161
- Median age
- 47.7
- Households
- 6,765
- Housing units
- 6,913
- Median home value
- $1,147,700
- Median gross rent
- $2,847 / month
- Congressional district
- MA-5 (119th Congress)
- USDA hardiness zone
- 6b (-5 to 0 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 02421 with another ZIP · ZIPs within 25 miles · distance from 02421
Map of ZIP code 02421
Climate — monthly normals
Warmest month Jul (avg high 85°F), coldest Jan (avg low 18°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 37 | 39 | 48 | 60 | 70 | 79 | 85 | 84 | 76 | 64 | 52 | 42 |
| Avg low °F | 18 | 19 | 27 | 37 | 47 | 56 | 62 | 60 | 52 | 41 | 32 | 24 |
| Precip in | 2.9 | 2.7 | 3.9 | 3.8 | 3.4 | 3.7 | 3.5 | 3.5 | 3.5 | 4.2 | 3.7 | 3.8 |
NOAA 1991–2020 climate normals from the nearest station: BEDFORD HANSCOM FLD (3.7 mi) · NOAA NCEI
Places in ZIP 02421
- 11 schools
- 2 hospitals & clinics
- 4 doctors & dentists
- 2 pharmacies
- 18 restaurants & cafés
- 11 parks
- 12 playgrounds
- 3 gyms & sports centres
- 2 libraries
- 11 places of worship
- 5 banks
- 7 gas stations
- 2 EV charging stations
- 1 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page