ZIP Code 85143

85143 is one of Arizona's ZIP codes, delivering to addresses in San Tan Valley, Pinal County.

City: San Tan Valley
County: Pinal County
State: Arizona
Prefix: 851xx

Where this code sits

85143 is part of the 851xx range, the group of codes handled by one mail processing centre. San Tan Valley is served by 3 ZIP codes in total.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 85143 delivers to without sharing its boundary.

520 Area code 520

ZIP codes nearest 85143

The ZIP codes whose reference points sit closest to 85143.
ZIP code	Distance	Delivers to
ZIP code 85140	0.0 mi	San Tan Valley, AZ
ZIP code 85144	0.0 mi	San Tan Valley, AZ
ZIP code 85142	7.3 mi	Queen Creek, AZ
ZIP code 85127	9.9 mi	Chandler Heights, AZ
ZIP code 85298	11 mi	Gilbert, AZ
ZIP code 85297	12 mi	Gilbert, AZ
ZIP code 85212	12 mi	Mesa, AZ
ZIP code 85236	12 mi	Higley, 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 85143, plotted from its record coordinates.

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

Scope ZIP code 85143. 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.