ZIP code 85387: Surprise, AZ
ZIP code 85387 is in Surprise (85% of residents), in Maricopa County, Arizona. 15% of its residents live outside city limits. It is in Arizona's 9th congressional district (71%) and Arizona's 8th congressional district (29%). Its state senate district is State Senate District 29; its state house district is State House District 29.
See it on the mapAll of Arizona
City and county
| City or town | Share of ZIP residents |
|---|---|
| Surprise | 85% |
| County | Share of ZIP residents |
|---|---|
| Maricopa County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Wickenburg CCD | 100% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Arizona's 9th congressional district (AZ-09) | 71% |
| Arizona's 8th congressional district (AZ-08) | 29% |
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 29 | 100% |
| State Senate District 28 | land only |
| State house district | Share of ZIP residents |
|---|---|
| State House District 29 | 100% |
| State House District 28 | land only |
Voting precincts
7 voting precincts overlap ZIP 85387. 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:85387")
ZIP 85387 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.