ZIP code 85645: Arivaca Junction, AZ
ZIP code 85645 is in Arivaca Junction (51% of residents), Elephant Head (31%) and Amado (10%), in Pima County (88%) and Santa Cruz County (12%), Arizona. 8.4% of its residents live outside city limits. It is in Arizona's 7th congressional district (66%) and Arizona's 6th congressional district (34%). Its state senate districts are State Senate District 21 (66%) and State Senate District 19 (34%); its state house districts are State House District 21 (66%) and State House District 19 (34%).
See it on the mapAll of Arizona
City and county
| City or town | Share of ZIP residents |
|---|---|
| Arivaca Junction | 51% |
| Elephant Head | 31% |
| Amado | 10% |
| County | Share of ZIP residents |
|---|---|
| Pima County | 88% |
| Santa Cruz County | 12% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Arivaca CCD | 54% |
| Tucson CCD | 34% |
| Nogales CCD | 12% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Arizona's 7th congressional district (AZ-07) | 66% |
| Arizona's 6th congressional district (AZ-06) | 34% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 21 | 66% |
| State Senate District 19 | 34% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 21 | 66% |
| State House District 19 | 34% |
Voting precincts
5 voting precincts overlap ZIP 85645. 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:85645")
ZIP 85645 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.