ZIP Code 57437

57437 is one of South Dakota's ZIP codes, delivering to addresses in Eureka, McPherson County.

City: Eureka
County: McPherson County
State: South Dakota
Prefix: 574xx

Where this code sits

57437 is part of the 574xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Eureka.

Eureka South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57437 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57437

The ZIP codes whose reference points sit closest to 57437.
ZIP code	Distance	Delivers to
ZIP code 57457	8.5 mi	Long Lake, SD
ZIP code 57448	16 mi	Hosmer, SD
ZIP code 57456	19 mi	Leola, SD
ZIP code 58413	20 mi	Ashley, ND
ZIP code 57471	24 mi	Roscoe, SD
ZIP code 58581	27 mi	Zeeland, ND
ZIP code 57428	27 mi	Bowdle, 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 57437, plotted from its record coordinates.

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

Scope ZIP code 57437. 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.