Boundary Atlas

ZIP code 01366: Petersham, MA

ZIP code 01366 is in Petersham (19% of residents), in Worcester County, Massachusetts. 81% of its residents live outside city limits. It is in Massachusetts's 2nd congressional district. Its state senate district is Hampshire-Franklin-Worcester District; its state house district is 7th Hampden District.

1,187residents (2020 Census)
36.9 sq miland area
1cities and towns
1congressional district
1voting precincts

See it on the mapAll of Massachusetts

City and county

City or townShare of ZIP residents
Petersham19%

CountyShare of ZIP residents
Worcester County100%

Town or county subdivisionShare of ZIP residents
Petersham town100%

Congressional district

Congressional districtShare of ZIP residents
Massachusetts's 2nd congressional district (MA-02)100%

State legislative districts

State senate districtShare of ZIP residents
Hampshire-Franklin-Worcester District100%

State house districtShare of ZIP residents
7th Hampden District100%

Voting precincts

1 voting precinct overlap ZIP 01366. Map them, with each precinct's share of the ZIP's residents.

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Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:zcta:01366")

ZIP 01366 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.