Boundary Atlas

ZIP code 85321: Ajo, AZ

ZIP code 85321 is in Ajo (83% of residents), Why (3.3%), Kaka (2.3%) and Ventana (1.4%), in Pima County (98%) and Maricopa County (2.4%), Arizona. 10% of its residents live outside city limits. It is in Arizona's 7th congressional district. Its state senate district is State Senate District 23; its state house district is State House District 23.

3,663residents (2020 Census)
1,343.8 sq miland area
5cities and towns
1congressional district
5voting precincts

See it on the mapAll of Arizona

City and county

City or townShare of ZIP residents
Ajo83%
Why3.3%
Kaka2.3%
Ventana1.4%
Charco0.7%

CountyShare of ZIP residents
Pima County98%
Maricopa County2.4%

Town or county subdivisionShare of ZIP residents
Ajo CCD87%
Tohono O'odham Nation CCD11%
Gila Bend CCD2.4%

Congressional district

Congressional districtShare of ZIP residents
Arizona's 7th congressional district (AZ-07)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (AZ-07)Adelita S. Grijalva (D)202-225-2435100%
U.S. SenatorMark Kelly (D)202-224-2235 · contact formstatewide
U.S. SenatorRuben Gallego (D)202-224-4521statewide
State Senator (State Senate District 23)Brian Fernandez (Democratic)100%
State Representative (State House District 23)Mariana Sandoval (Democratic)100%
State Representative (State House District 23)Michele Peña (R)100%

Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

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

5 voting precincts overlap ZIP 85321. 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:

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ZIP 85321 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.