In which county is ZIP code 85378 located?

ZIP 85378 is listed under Maricopa County, AZ.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 85378: Surprise, AZ

ZIP: 85378

County: Maricopa County

Coordinates: 33.63060, -112.33320

ZIP Type: Standard

Time Zone: Mountain Time (MT)

Get a reliable snapshot of the Surprise, AZ postal area 85378. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Surprise
ZIP Code	85378
County	Maricopa County
State	AZ
Latitude / Longitude	33.63060, -112.33320
ZIP Type	Standard
Time Zone	Mountain Time (MT)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 85378 (not an exact boundary).

Geographic & Administrative Context

For mapping and verification, 85378 is commonly represented around 33.63060, -112.33320. These coordinates help identify the general area within Maricopa County, AZ.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 85378 for mail delivery and general location reference in Maricopa County, AZ.

Some addresses near Surprise may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Surprise within AZ.

Frequently Asked Questions

What is the primary city for ZIP code 85378?

The primary city for this ZIP code is Surprise, located in AZ.

In which county is 85378 located?

ZIP code 85378 is situated within Maricopa County, AZ.

What are the coordinates for 85378?

The approximate center point is 33.63060 (Latitude) and -112.33320 (Longitude).

Is ZIP code 85378 active?

This page lists ZIP 85378 as Listed based on the latest refresh date shown above.

Does ZIP 85378 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08