ZIP Code 57439

57439 is one of South Dakota's ZIP codes, delivering to addresses in Ferney, Brown County.

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

Where this code sits

57439 is part of the 574xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Ferney.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57439 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57439

The ZIP codes whose reference points sit closest to 57439.
ZIP code	Distance	Delivers to
ZIP code 57445	8.4 mi	Groton, SD
ZIP code 57474	9.9 mi	Stratford, SD
ZIP code 57422	10 mi	Andover, SD
ZIP code 57434	14 mi	Conde, SD
ZIP code 57219	14 mi	Bristol, SD
ZIP code 57427	16 mi	Bath, SD
ZIP code 57429	16 mi	Brentford, SD
ZIP code 57468	18 mi	Pierpont, 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 57439, plotted from its record coordinates.

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

Scope ZIP code 57439. 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.