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City ZIP codes · Massachusetts

Acton, MA ZIP Codes

2 ZIP codes use the postal name Acton, Massachusetts (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. Acton's most populous ZIP code is 01720, with 23,526 people (ACS 2020-2024); 0% of its land is in the city of Acton.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Acton's ZIP codes?

01718: $104k median household income01720: $159k median household income0172001718: $104k median household income01720: $159k median household income0172001718: $104k median household income01720: $159k median household income01720
The 2 residential ZIP codes named Acton, 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).

All 2 residential ZIP codes of Acton

Residential ZIP codes with the postal name Acton, MA, largest first (ACS 2020-2024); sort by any column
County
01720 Middlesex County 23,526 1,199 $159k $814k
01718 Middlesex County 404 2,928 $104k $376k

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 Acton's ZIP codes reach?

Acton's residential ZIP codes lie in Middlesex County.

Which first three digits do Acton'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 Acton starts with 017.

Three-digit prefixes of Acton'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 Acton's
PrefixSectional centerHereAll codes
017 Central, MA (SCF 015) 2 31

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