ZIP Code 57755

57755 is one of South Dakota's ZIP codes, delivering to addresses in Ludlow, Harding County.

City: Ludlow
County: Harding County
State: South Dakota
Prefix: 577xx

Where this code sits

57755 is part of the 577xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Ludlow.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57755 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57755

The ZIP codes whose reference points sit closest to 57755.
ZIP code	Distance	Delivers to
ZIP code 57650	15 mi	Ralph, SD
ZIP code 58653	20 mi	Scranton, ND
ZIP code 57720	21 mi	Buffalo, SD
ZIP code 58623	23 mi	Bowman, ND
ZIP code 57651	25 mi	Reva, SD
ZIP code 58649	27 mi	Reeder, ND
ZIP code 57640	28 mi	Lodgepole, SD
ZIP code 58651	29 mi	Rhame, ND

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 57755, plotted from its record coordinates.

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

Scope ZIP code 57755. 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.