ZIP Code 57621

57621 is one of South Dakota's ZIP codes, delivering to addresses in Bullhead, Corson County.

City: Bullhead
County: Corson County
State: South Dakota
Prefix: 576xx

Where this code sits

57621 is part of the 576xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Bullhead.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57621 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57621

The ZIP codes whose reference points sit closest to 57621.
ZIP code	Distance	Delivers to
ZIP code 57641	5.3 mi	Mc Intosh, SD
ZIP code 57659	10 mi	Walker, SD
ZIP code 57642	12 mi	Mc Laughlin, SD
ZIP code 57639	15 mi	Little Eagle, SD
ZIP code 58568	19 mi	Selfridge, ND
ZIP code 57630	23 mi	Glencross, SD
ZIP code 57660	24 mi	Watauga, SD
ZIP code 57656	26 mi	Timber Lake, SD

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 57621, plotted from its record coordinates.

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

Scope ZIP code 57621. 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.