ZIP Code 57634

57634 is one of South Dakota's ZIP codes, delivering to addresses in Keldron, Corson County.

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

Where this code sits

57634 is part of the 576xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Keldron.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57634 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57634

The ZIP codes whose reference points sit closest to 57634.
ZIP code	Distance	Delivers to
ZIP code 57645	15 mi	Morristown, SD
ZIP code 57638	19 mi	Lemmon, SD
ZIP code 57660	22 mi	Watauga, SD
ZIP code 57633	33 mi	Isabel, SD
ZIP code 57620	33 mi	Bison, SD
ZIP code 57644	34 mi	Meadow, SD
ZIP code 57641	35 mi	Mc Intosh, SD
ZIP code 57621	39 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 57634, plotted from its record coordinates.

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

Scope ZIP code 57634. 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.