ZIP Code 57445

57445 is one of South Dakota's ZIP codes, delivering to addresses in Groton, Brown County.

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

Where this code sits

57445 is part of the 574xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Groton.

Groton South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57445 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57445

The ZIP codes whose reference points sit closest to 57445.
ZIP code	Distance	Delivers to
ZIP code 57439	8.4 mi	Ferney, SD
ZIP code 57422	9.3 mi	Andover, SD
ZIP code 57427	12 mi	Bath, SD
ZIP code 57474	14 mi	Stratford, SD
ZIP code 57468	15 mi	Pierpont, SD
ZIP code 57432	15 mi	Claremont, SD
ZIP code 57402	15 mi	Aberdeen, SD
ZIP code 57433	17 mi	Columbia, 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 57445, plotted from its record coordinates.

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

Scope ZIP code 57445. 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.