Boundary Atlas

ZIP code 83604: Owyhee County, ID

ZIP code 83604 is in Bruneau (18% of residents), in Owyhee County, Idaho. 82% of its residents live outside city limits. It is in Idaho's 1st congressional district. Its state senate district is State Senate District 23; its state house district is State House District 23.

676residents (2020 Census)
793.8 sq miland area
1cities and towns
1congressional district
4voting precincts

See it on the mapAll of Idaho

City and county

City or townShare of ZIP residents
Bruneau18%

CountyShare of ZIP residents
Owyhee County100%

Town or county subdivisionShare of ZIP residents
Bruneau CCD51%
Grand View CCD49%

Congressional district

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 23100%

State house districtShare of ZIP residents
State House District 23100%

Voting precincts

4 voting precincts overlap ZIP 83604. 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:83604")

ZIP 83604 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.