ZIP code 85378: Surprise, AZ
ZIP code 85378 is in Surprise (92% of residents) and Sun City (8.2%), in Maricopa County, Arizona. It is in Arizona's 9th congressional district (53%) and Arizona's 8th congressional district (47%). Its state senate districts are State Senate District 29 (53%) and State Senate District 28 (47%); its state house districts are State House District 29 (53%) and State House District 28 (47%).
See it on the mapAll of Arizona
City and county
| City or town | Share of ZIP residents |
|---|---|
| Surprise | 92% |
| Sun City | 8.2% |
| County | Share of ZIP residents |
|---|---|
| Maricopa County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Phoenix CCD | 100% |
| Wickenburg CCD | land only |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Arizona's 9th congressional district (AZ-09) | 53% |
| Arizona's 8th congressional district (AZ-08) | 47% |
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.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Kevin Sartor | 623-222-1313 | 92% |
| U.S. Representative (AZ-09) | Paul A. Gosar (R) | 202-225-2315 | 53% |
| U.S. Representative (AZ-08) | Abraham J. Hamadeh (R) | 202-225-4576 | 47% |
| U.S. Senator | Mark Kelly (D) | 202-224-2235 · contact form | statewide |
| U.S. Senator | Ruben Gallego (D) | 202-224-4521 | statewide |
| State Senator (State Senate District 29) | Janae Shamp (R) | 53% | |
| State Senator (State Senate District 28) | Frank Carroll (R) | 47% | |
| State Representative (State House District 29) | James Taylor (R) | 53% | |
| State Representative (State House District 29) | Steve Montenegro (R) | 53% | |
| State Representative (State House District 28) | Beverly Pingerelli (R) | 47% | |
| State Representative (State House District 28) | David Livingston (R) | 47% |
Officials serving now (members of Congress until January 3, 2027). Sources: Mayors: Open States (public domain); State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- Surprise website: http://www.surpriseaz.gov/
- Surprise laws: search for the Surprise, Arizona code of ordinances
- Sun City laws: search for the Sun City, Arizona code of ordinances
- Maricopa County website: https://maricopa.gov
- Maricopa County laws: search for the Maricopa County, Arizona code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 29 | 53% |
| State Senate District 28 | 47% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 29 | 53% |
| State House District 28 | 47% |
Voting precincts
7 voting precincts overlap ZIP 85378. 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://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:85378")
ZIP 85378 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.