ZIP Code 57630

57630 is one of South Dakota's ZIP codes, delivering to addresses in Glencross, Dewey County.

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

Where this code sits

57630 is part of the 576xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Glencross.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57630 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57630

The ZIP codes whose reference points sit closest to 57630.
ZIP code	Distance	Delivers to
ZIP code 57656	6.7 mi	Timber Lake, SD
ZIP code 57657	9.6 mi	Trail City, SD
ZIP code 57661	12 mi	Whitehorse, SD
ZIP code 57639	17 mi	Little Eagle, SD
ZIP code 57641	21 mi	Mc Intosh, SD
ZIP code 57652	23 mi	Ridgeview, SD
ZIP code 57621	23 mi	Bullhead, SD
ZIP code 57601	25 mi	Mobridge, 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 57630, plotted from its record coordinates.

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

Scope ZIP code 57630. 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.