ZIP Code 85621

85621 is one of Arizona's ZIP codes, delivering to addresses in Nogales, Santa Cruz County.

City: Nogales
County: Santa Cruz County
State: Arizona
Prefix: 856xx

Where this code sits

85621 is part of the 856xx range, the group of codes handled by one mail processing centre. Nogales is served by 3 ZIP codes in total; the full list, with the county each falls in, is on the Nogales page.

Nogales Arizona ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 85621 delivers to without sharing its boundary.

520 Area code 520

ZIP codes nearest 85621

The ZIP codes whose reference points sit closest to 85621.
ZIP code	Distance	Delivers to
ZIP code 85628	11 mi	Nogales, AZ
ZIP code 85662	11 mi	Nogales, AZ
ZIP code 85648	12 mi	Rio Rico, AZ
ZIP code 85640	15 mi	Tumacacori, AZ
ZIP code 85646	17 mi	Tubac, AZ
ZIP code 85624	18 mi	Patagonia, AZ
ZIP code 85645	22 mi	Amado, AZ
ZIP code 85601	26 mi	Arivaca, 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 85621, plotted from its record coordinates.

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

Scope ZIP code 85621. 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.