ZIP Code 83428

83428 is one of Idaho's ZIP codes, delivering to addresses in Irwin, Bonneville County.

City: Irwin
County: Bonneville County
State: Idaho
Prefix: 834xx

Where this code sits

83428 is part of the 834xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Irwin.

Irwin Idaho ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 83428 delivers to without sharing its boundary.

ZIP codes nearest 83428

The ZIP codes whose reference points sit closest to 83428.
ZIP code	Distance	Delivers to
ZIP code 83449	6.6 mi	Swan Valley, ID
ZIP code 83443	17 mi	Ririe, ID
ZIP code 83455	17 mi	Victor, ID
ZIP code 83128	19 mi	Alpine, WY
ZIP code 83014	21 mi	Wilson, WY
ZIP code 83422	24 mi	Driggs, ID
ZIP code 83285	25 mi	Wayan, ID
ZIP code 83002	25 mi	Jackson, WY

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 83428, plotted from its record coordinates.

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

Scope ZIP code 83428. 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.