ZIP Code 57266

57266 is one of South Dakota's ZIP codes, delivering to addresses in Summit, Roberts County.

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

Where this code sits

57266 is part of the 572xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Summit.

Summit South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57266 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57266

The ZIP codes whose reference points sit closest to 57266.
ZIP code	Distance	Delivers to
ZIP code 57251	8.5 mi	Marvin, SD
ZIP code 57256	9.4 mi	Ortley, SD
ZIP code 57279	10 mi	Wilmot, SD
ZIP code 57257	12 mi	Peever, SD
ZIP code 57273	12 mi	Waubay, SD
ZIP code 57269	14 mi	Twin Brooks, SD
ZIP code 57239	17 mi	Grenville, SD
ZIP code 57263	17 mi	South Shore, 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 57266, plotted from its record coordinates.

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

Scope ZIP code 57266. 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.