ZIP Code 85640

85640 is one of Arizona's ZIP codes, delivering to addresses in Tumacacori, Santa Cruz County.

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

Where this code sits

85640 is part of the 856xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Tumacacori.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 85640 delivers to without sharing its boundary.

520 Area code 520

ZIP codes nearest 85640

The ZIP codes whose reference points sit closest to 85640.
ZIP code	Distance	Delivers to
ZIP code 85646	3.0 mi	Tubac, AZ
ZIP code 85648	4.4 mi	Rio Rico, AZ
ZIP code 85645	7.6 mi	Amado, AZ
ZIP code 85628	8.9 mi	Nogales, AZ
ZIP code 85662	8.9 mi	Nogales, AZ
ZIP code 85621	15 mi	Nogales, AZ
ZIP code 85601	16 mi	Arivaca, AZ
ZIP code 85622	18 mi	Green Valley, 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 85640, plotted from its record coordinates.

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

Scope ZIP code 85640. 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.