ZIP Code 57233

57233 is one of South Dakota's ZIP codes, delivering to addresses in Erwin, Kingsbury County.

City: Erwin
County: Kingsbury County
State: South Dakota
Prefix: 572xx

Where this code sits

57233 is part of the 572xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Erwin.

Erwin South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57233 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57233

The ZIP codes whose reference points sit closest to 57233.
ZIP code	Distance	Delivers to
ZIP code 57221	7.7 mi	Bryant, SD
ZIP code 57249	8.6 mi	Lake Preston, SD
ZIP code 57214	9.5 mi	Badger, SD
ZIP code 57231	11 mi	De Smet, SD
ZIP code 57248	12 mi	Lake Norden, SD
ZIP code 57241	15 mi	Hayti, SD
ZIP code 57278	16 mi	Willow Lake, SD
ZIP code 57271	18 mi	Vienna, 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 57233, plotted from its record coordinates.

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

Scope ZIP code 57233. 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.