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City ZIP codes · Massachusetts

Dorchester, MA ZIP Codes

3 ZIP codes use the postal name Dorchester, Massachusetts (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. Median household income runs from $43,136 in 02121 to $86,150 in 02122, 2.0 times as much (Census Bureau, ACS 2020-2024). Dorchester's most populous ZIP code is 02125, with 33,662 people (ACS 2020-2024); 0% of its land is in the city of Dorchester.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Dorchester's ZIP codes?

02121: $43k median household income02122: $86k median household income02125: $83k median household income02125021220212102121: $43k median household income02122: $86k median household income02125: $83k median household income02125021220212102121: $43k median household income02122: $86k median household income02125: $83k median household income021250212202121
The 3 residential ZIP codes named Dorchester, 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 Dorchester's ZIP codes?

The highest median household income is in 02122 ($86,150), the lowest in 02121 ($43,136). Home values run from $590,200 in 02121 to $669,900 in 02122.

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

All 3 residential ZIP codes of Dorchester

Residential ZIP codes with the postal name Dorchester, MA, largest first (ACS 2020-2024); sort by any column
County
02125 Suffolk County 33,662 15,527 $83k $657k
02121 Suffolk County 29,040 15,398 $43k $590k
02122 Suffolk County 23,479 13,836 $86k $670k

Download the 3 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 Dorchester's ZIP codes reach?

Dorchester's residential ZIP codes lie in Suffolk County.

Which places do Dorchester's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Dorchester's residential ZIP codes cover 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:

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

Which first three digits do Dorchester'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 Dorchester starts with 021.

Three-digit prefixes of Dorchester'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 Dorchester's
PrefixSectional centerHereAll codes
021 Boston, MA (SCF 021) 3 62

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