ZIP Code 57430

57430 is one of South Dakota's ZIP codes, delivering to addresses in Britton, Marshall County.

City: Britton
County: Marshall County
State: South Dakota
Prefix: 574xx

Where this code sits

57430 is part of the 574xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Britton.

Britton South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57430 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57430

The ZIP codes whose reference points sit closest to 57430.
ZIP code	Distance	Delivers to
ZIP code 57421	9.4 mi	Amherst, SD
ZIP code 58043	13 mi	Havana, ND
ZIP code 57454	13 mi	Langford, SD
ZIP code 57449	17 mi	Houghton, SD
ZIP code 57432	17 mi	Claremont, SD
ZIP code 58017	19 mi	Cogswell, ND
ZIP code 58032	19 mi	Forman, ND
ZIP code 57247	21 mi	Lake City, 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 57430, plotted from its record coordinates.

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

Scope ZIP code 57430. 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.