ZIP Code 57256

57256 is one of South Dakota's ZIP codes, delivering to addresses in Ortley, Roberts County.

City: Ortley
County: Roberts County
State: South Dakota
Prefix: 572xx

Where this code sits

57256 is part of the 572xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Ortley.

Ortley South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57256 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57256

The ZIP codes whose reference points sit closest to 57256.
ZIP code	Distance	Delivers to
ZIP code 57273	9.2 mi	Waubay, SD
ZIP code 57266	9.4 mi	Summit, SD
ZIP code 57251	14 mi	Marvin, SD
ZIP code 57263	15 mi	South Shore, SD
ZIP code 57235	15 mi	Florence, SD
ZIP code 57274	17 mi	Webster, SD
ZIP code 57272	18 mi	Wallace, SD
ZIP code 57239	18 mi	Grenville, 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 57256, plotted from its record coordinates.

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

Scope ZIP code 57256. 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.