Boundary Atlas

ZIP code 01604: Worcester, MA

ZIP code 01604 is in Worcester, in Worcester County, Massachusetts. It is in Massachusetts's 2nd congressional district. Its state senate districts are Second Worcester District (95%) and First Worcester District (4.8%); its state house districts are 16th Worcester District (54%), 15th Worcester District (46%) and 14th Worcester District (<0.1%).

41,301residents (2020 Census)
6.6 sq miland area
1cities and towns
1congressional district
16voting precincts

See it on the mapAll of Massachusetts

City and county

City or townShare of ZIP residents
Worcester100%

CountyShare of ZIP residents
Worcester County100%

Town or county subdivisionShare of ZIP residents
Worcester city100%

Congressional district

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

State legislative districts

State senate districtShare of ZIP residents
Second Worcester District95%
First Worcester District4.8%

State house districtShare of ZIP residents
16th Worcester District54%
15th Worcester District46%
14th Worcester District<0.1%

Voting precincts

16 voting precincts overlap ZIP 01604. Map them, with each precinct's share of the ZIP's residents.

Get this in your AI agent

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:01604")

ZIP 01604 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.