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City ZIP codes · Massachusetts

Lexington, MA ZIP Codes

2 ZIP codes use the postal name Lexington, Massachusetts (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. Median household income runs from $227,813 in 02421 to $245,031 in 02420 (Census Bureau, ACS 2020-2024). Lexington's most populous ZIP code is 02421, with 18,080 people (ACS 2020-2024); 100% of its land is in the city of Lexington.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Lexington's ZIP codes?

02420: $245k median household income02421: $228k median household income024210242002420: $245k median household income02421: $228k median household income024210242002420: $245k median household income02421: $228k median household income0242102420
The 2 residential ZIP codes named Lexington, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are Lexington's ZIP codes?

The highest median household income is in 02420 ($245,031), the lowest in 02421 ($227,813). Home values run from $1,200,300 in 02420 to $1,205,700 in 02421.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 2 residential ZIP codes of Lexington

Residential ZIP codes with the postal name Lexington, MA, largest first (ACS 2020-2024); sort by any column
County
02421 Middlesex County 18,080 1,889 $228k $1.21M
02420 Middlesex County 16,215 2,304 $245k $1.2M

Download the 2 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

Which counties do Lexington's ZIP codes reach?

Lexington's residential ZIP codes lie in Middlesex County.

Which places do Lexington's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Lexington's residential ZIP codes cover Lexington itself and 1 other place, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

  • Burlington census-designated 02420

Source: U.S. Census Bureau, 2020 ZCTA-to-place relationship file (shares of land).

Which first three digits do Lexington's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Lexington starts with 024.

Three-digit prefixes of Lexington's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Lexington's
PrefixSectional centerHereAll codes
024 Boston, MA (SCF 021) 2 36

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.