ZIP Code 84021

84021 is one of Utah's ZIP codes, delivering to addresses in Duchesne, Duchesne County.

City: Duchesne
County: Duchesne County
State: Utah
Prefix: 840xx

Where this code sits

84021 is part of the 840xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Duchesne.

Duchesne Utah ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 84021 delivers to without sharing its boundary.

435 Area code 435

ZIP codes nearest 84021

The ZIP codes whose reference points sit closest to 84021.
ZIP code	Distance	Delivers to
ZIP code 84073	11 mi	Talmage, UT
ZIP code 84001	15 mi	Altamont, UT
ZIP code 84051	16 mi	Mountain Home, UT
ZIP code 84007	17 mi	Bluebell, UT
ZIP code 84002	17 mi	Altonah, UT
ZIP code 84052	19 mi	Myton, UT
ZIP code 84072	22 mi	Tabiona, UT
ZIP code 84027	22 mi	Fruitland, UT

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 84021, plotted from its record coordinates.

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

Scope ZIP code 84021. 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.