ZIP Code 57223

57223 is one of South Dakota's ZIP codes, delivering to addresses in Castlewood, Hamlin County.

City: Castlewood
County: Hamlin County
State: South Dakota
Prefix: 572xx

Where this code sits

57223 is part of the 572xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Castlewood.

Castlewood South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57223 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57223

The ZIP codes whose reference points sit closest to 57223.
ZIP code	Distance	Delivers to
ZIP code 57234	11 mi	Estelline, SD
ZIP code 57241	11 mi	Hayti, SD
ZIP code 57245	12 mi	Kranzburg, SD
ZIP code 57238	13 mi	Goodwin, SD
ZIP code 57201	13 mi	Watertown, SD
ZIP code 57248	14 mi	Lake Norden, SD
ZIP code 57242	14 mi	Hazel, SD
ZIP code 57226	16 mi	Clear Lake, 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 57223, plotted from its record coordinates.

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

Scope ZIP code 57223. 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.