ZIP Code 57438

57438 is one of South Dakota's ZIP codes, delivering to addresses in Faulkton, Faulk County.

City: Faulkton
County: Faulk County
State: South Dakota
Prefix: 574xx

Where this code sits

57438 is part of the 574xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Faulkton.

Faulkton South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57438 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57438

The ZIP codes whose reference points sit closest to 57438.
ZIP code	Distance	Delivers to
ZIP code 57473	14 mi	Seneca, SD
ZIP code 57435	14 mi	Cresbard, SD
ZIP code 57466	15 mi	Onaka, SD
ZIP code 57467	18 mi	Orient, SD
ZIP code 57475	21 mi	Tolstoy, SD
ZIP code 57470	22 mi	Rockham, SD
ZIP code 57471	25 mi	Roscoe, SD
ZIP code 57451	27 mi	Ipswich, 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 57438, plotted from its record coordinates.

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

Scope ZIP code 57438. 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.