Boundary Atlas

ZIP code 01151: Springfield, MA

ZIP code 01151 is in Springfield, in Hampden County, Massachusetts. It is in Massachusetts's 1st congressional district. Its state senate district is Hampden District; its state house districts are 9th Hampden District (98%) and 12th Hampden District (1.9%).

9,150residents (2020 Census)
2.4 sq miland area
1cities and towns
1congressional district
6voting precincts

See it on the mapAll of Massachusetts

City and county

City or townShare of ZIP residents
Springfield100%

CountyShare of ZIP residents
Hampden County100%

Town or county subdivisionShare of ZIP residents
Springfield city100%

Congressional district

Congressional districtShare of ZIP residents
Massachusetts's 1st congressional district (MA-01)100%

State legislative districts

State senate districtShare of ZIP residents
Hampden District100%

State house districtShare of ZIP residents
9th Hampden District98%
12th Hampden District1.9%

Voting precincts

6 voting precincts overlap ZIP 01151. 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:01151")

ZIP 01151 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.