ZIP Code 85138

85138 is one of Arizona's ZIP codes, delivering to addresses in Maricopa, Pinal County.

City: Maricopa
County: Pinal County
State: Arizona
Prefix: 851xx

Where this code sits

85138 is part of the 851xx range, the group of codes handled by one mail processing centre. Maricopa is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the Maricopa page.

Maricopa Arizona ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 85138 delivers to without sharing its boundary.

520 Area code 520

ZIP codes nearest 85138

The ZIP codes whose reference points sit closest to 85138.
ZIP code	Distance	Delivers to
ZIP code 85139	7.8 mi	Maricopa, AZ
ZIP code 85172	8.9 mi	Stanfield, AZ
ZIP code 85121	9.3 mi	Bapchule, AZ
ZIP code 85193	13 mi	Casa Grande, AZ
ZIP code 85122	13 mi	Casa Grande, AZ
ZIP code 85147	14 mi	Sacaton, AZ
ZIP code 85248	17 mi	Chandler, AZ
ZIP code 85249	19 mi	Chandler, AZ

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 85138, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 85138. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.