ZIP Code 57631

57631 is one of South Dakota's ZIP codes, delivering to addresses in Glenham, Walworth County.

City: Glenham
County: Walworth County
State: South Dakota
Prefix: 576xx

Where this code sits

57631 is part of the 576xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Glenham.

Glenham South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57631 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57631

The ZIP codes whose reference points sit closest to 57631.
ZIP code	Distance	Delivers to
ZIP code 57601	7.8 mi	Mobridge, SD
ZIP code 57472	11 mi	Selby, SD
ZIP code 57646	15 mi	Mound City, SD
ZIP code 57420	16 mi	Akaska, SD
ZIP code 57658	17 mi	Wakpala, SD
ZIP code 57657	22 mi	Trail City, SD
ZIP code 57452	23 mi	Java, SD
ZIP code 57632	24 mi	Herreid, 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 57631, plotted from its record coordinates.

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

Scope ZIP code 57631. 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.