ZIP Code 57481

57481 is one of South Dakota's ZIP codes, delivering to addresses in Westport, Brown County.

City: Westport
County: Brown County
State: South Dakota
Prefix: 574xx

Where this code sits

57481 is part of the 574xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Westport.

Westport South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57481 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57481

The ZIP codes whose reference points sit closest to 57481.
ZIP code	Distance	Delivers to
ZIP code 57426	5.9 mi	Barnard, SD
ZIP code 57402	12 mi	Aberdeen, SD
ZIP code 57441	13 mi	Frederick, SD
ZIP code 57433	13 mi	Columbia, SD
ZIP code 57401	15 mi	Aberdeen, SD
ZIP code 57456	18 mi	Leola, SD
ZIP code 57427	18 mi	Bath, SD
ZIP code 57479	23 mi	Warner, 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 57481, plotted from its record coordinates.

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

Scope ZIP code 57481. 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.