ZIP Code 83251

83251 is one of Idaho's ZIP codes, delivering to addresses in Mackay, Custer County.

City: Mackay
County: Custer County
State: Idaho
Prefix: 832xx

Where this code sits

83251 is part of the 832xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Mackay.

Mackay Idaho ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 83251 delivers to without sharing its boundary.

ZIP codes nearest 83251

The ZIP codes whose reference points sit closest to 83251.
ZIP code	Distance	Delivers to
ZIP code 83255	15 mi	Moore, ID
ZIP code 83213	24 mi	Arco, ID
ZIP code 83244	26 mi	Howe, ID
ZIP code 83353	39 mi	Sun Valley, ID
ZIP code 83354	42 mi	Sun Valley, ID
ZIP code 83333	44 mi	Hailey, ID
ZIP code 83313	46 mi	Bellevue, ID
ZIP code 83320	46 mi	Carey, ID

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 83251, plotted from its record coordinates.

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

Scope ZIP code 83251. 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.