ZIP Code 57451

57451 is one of South Dakota's ZIP codes, delivering to addresses in Ipswich, Edmunds County.

City: Ipswich
County: Edmunds County
State: South Dakota
Prefix: 574xx

Where this code sits

57451 is part of the 574xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Ipswich.

Ipswich South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57451 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57451

The ZIP codes whose reference points sit closest to 57451.
ZIP code	Distance	Delivers to
ZIP code 57471	16 mi	Roscoe, SD
ZIP code 57456	19 mi	Leola, SD
ZIP code 57435	20 mi	Cresbard, SD
ZIP code 57448	24 mi	Hosmer, SD
ZIP code 57481	26 mi	Westport, SD
ZIP code 57460	26 mi	Mansfield, SD
ZIP code 57465	26 mi	Northville, SD
ZIP code 57438	27 mi	Faulkton, 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 57451, plotted from its record coordinates.

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

Scope ZIP code 57451. 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.