Boundary Atlas

ZIP code 03470: Winchester, NH

ZIP code 03470 is in Winchester (32% of residents), in Cheshire County, New Hampshire. 68% of its residents live outside city limits. It is in New Hampshire's 2nd congressional district. Its state senate district is State Senate District 9; its state house districts are State House District Cheshire 11 (76%) and State House District Cheshire 10 (24%).

4,993residents (2020 Census)
88.2 sq miland area
1cities and towns
1congressional district
2voting precincts

See it on the mapAll of New Hampshire

City and county

City or townShare of ZIP residents
Winchester32%

CountyShare of ZIP residents
Cheshire County100%

Town or county subdivisionShare of ZIP residents
Winchester town76%
Richmond town24%

Congressional district

Congressional districtShare of ZIP residents
New Hampshire's 2nd congressional district (NH-02)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 9100%

State house districtShare of ZIP residents
State House District Cheshire 1176%
State House District Cheshire 1024%

Voting precincts

2 voting precincts overlap ZIP 03470. 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:03470")

ZIP 03470 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.