ZIP Code 85643

85643 is one of Arizona's ZIP codes, delivering to addresses in Willcox, Cochise County.

City: Willcox
County: Cochise County
State: Arizona
Prefix: 856xx

Where this code sits

85643 is part of the 856xx range, the group of codes handled by one mail processing centre. Willcox is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the Willcox page.

Willcox Arizona ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 85643 delivers to without sharing its boundary.

520 Area code 520

ZIP codes nearest 85643

The ZIP codes whose reference points sit closest to 85643.
ZIP code	Distance	Delivers to
ZIP code 85644	8.5 mi	Willcox, AZ
ZIP code 85606	19 mi	Cochise, AZ
ZIP code 85605	22 mi	Bowie, AZ
ZIP code 85609	26 mi	Dragoon, AZ
ZIP code 85548	30 mi	Safford, AZ
ZIP code 85551	33 mi	Solomon, AZ
ZIP code 85552	34 mi	Thatcher, AZ
ZIP code 85546	34 mi	Safford, 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 85643, plotted from its record coordinates.

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

Scope ZIP code 85643. 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.