ZIP Code 85618

85618 is one of Arizona's ZIP codes, delivering to addresses in Mammoth, Pinal County.

City: Mammoth
County: Pinal County
State: Arizona
Prefix: 856xx

Where this code sits

85618 is part of the 856xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Mammoth.

Mammoth Arizona ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 85618 delivers to without sharing its boundary.

520 Area code 520

ZIP codes nearest 85618

The ZIP codes whose reference points sit closest to 85618.
ZIP code	Distance	Delivers to
ZIP code 85631	7.6 mi	San Manuel, AZ
ZIP code 85623	12 mi	Oracle, AZ
ZIP code 85192	21 mi	Winkelman, AZ
ZIP code 85135	21 mi	Hayden, AZ
ZIP code 85738	22 mi	Catalina, AZ
ZIP code 85739	23 mi	Tucson, AZ
ZIP code 85619	25 mi	Mount Lemmon, AZ
ZIP code 85737	28 mi	Tucson, 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 85618, plotted from its record coordinates.

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

Scope ZIP code 85618. 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.