Boundary Atlas

ZIP code 96041: Post Mountain, CA

ZIP code 96041 is in Post Mountain (54% of residents) and Hayfork (42%), in Trinity County, California. It is in California's 2nd congressional district. Its state senate district is State Senate District 2; its state house district is Assembly District 2.

5,574residents (2020 Census)
335.5 sq miland area
2cities and towns
1congressional district
5voting precincts

See it on the mapAll of California

City and county

City or townShare of ZIP residents
Post Mountain54%
Hayfork42%

CountyShare of ZIP residents
Trinity County100%

Town or county subdivisionShare of ZIP residents
Hayfork CCD100%
Mad River CCD0.3%

Congressional district

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2100%

State house districtShare of ZIP residents
Assembly District 2100%

Voting precincts

5 voting precincts overlap ZIP 96041. 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:96041")

ZIP 96041 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.