Boundary Atlas

ZIP code 85643: Willcox, AZ

ZIP code 85643 is in Willcox (40% of residents), in Cochise County (88%) and Graham County (12%), Arizona. 60% of its residents live outside city limits. It is in Arizona's 6th congressional district. Its state senate district is State Senate District 19; its state house district is State House District 19.

8,208residents (2020 Census)
2,206.7 sq miland area
1cities and towns
1congressional district
10voting precincts

See it on the mapAll of Arizona

City and county

City or townShare of ZIP residents
Willcox40%

CountyShare of ZIP residents
Cochise County88%
Graham County12%

Town or county subdivisionShare of ZIP residents
Willcox CCD83%
Bonita-Klondyke CCD12%
Bowie CCD4.2%
Benson CCD0.4%
Pima CCD<0.1%

Congressional district

Congressional districtShare of ZIP residents
Arizona's 6th congressional district (AZ-06)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 19100%

State house districtShare of ZIP residents
State House District 19100%

Voting precincts

10 voting precincts overlap ZIP 85643. 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:85643")

ZIP 85643 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.