ZIP Code 57633

57633 is one of South Dakota's ZIP codes, delivering to addresses in Isabel, Dewey County.

City: Isabel
County: Dewey County
State: South Dakota
Prefix: 576xx

Where this code sits

57633 is part of the 576xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Isabel.

Isabel South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57633 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57633

The ZIP codes whose reference points sit closest to 57633.
ZIP code	Distance	Delivers to
ZIP code 57656	20 mi	Timber Lake, SD
ZIP code 57630	25 mi	Glencross, SD
ZIP code 57641	26 mi	Mc Intosh, SD
ZIP code 57636	26 mi	Lantry, SD
ZIP code 57661	28 mi	Whitehorse, SD
ZIP code 57623	29 mi	Dupree, SD
ZIP code 57625	29 mi	Eagle Butte, SD
ZIP code 57621	31 mi	Bullhead, 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 57633, plotted from its record coordinates.

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

Scope ZIP code 57633. 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.