ZIP Code 57538

57538 is one of South Dakota's ZIP codes, delivering to addresses in Herrick, Gregory County.

City: Herrick
County: Gregory County
State: South Dakota
Prefix: 575xx

Where this code sits

57538 is part of the 575xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Herrick.

Herrick South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57538 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57538

The ZIP codes whose reference points sit closest to 57538.
ZIP code	Distance	Delivers to
ZIP code 57571	6.4 mi	Saint Charles, SD
ZIP code 57523	6.8 mi	Burke, SD
ZIP code 57533	11 mi	Gregory, SD
ZIP code 57317	12 mi	Bonesteel, SD
ZIP code 68755	13 mi	Naper, NE
ZIP code 68753	17 mi	Mills, NE
ZIP code 57529	18 mi	Dallas, SD
ZIP code 57335	20 mi	Fairfax, 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 57538, plotted from its record coordinates.

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

Scope ZIP code 57538. 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.