ZIP Code 57779

57779 is one of South Dakota's ZIP codes, delivering to addresses in Saint Onge, Lawrence County.

City: Saint Onge
County: Lawrence County
State: South Dakota
Prefix: 577xx

Where this code sits

57779 is part of the 577xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Saint Onge.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57779 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57779

The ZIP codes whose reference points sit closest to 57779.
ZIP code	Distance	Delivers to
ZIP code 57793	7.4 mi	Whitewood, SD
ZIP code 57783	7.9 mi	Spearfish, SD
ZIP code 57799	8.1 mi	Spearfish, SD
ZIP code 57717	10 mi	Belle Fourche, SD
ZIP code 57732	12 mi	Deadwood, SD
ZIP code 57762	12 mi	Nisland, SD
ZIP code 57741	16 mi	Fort Meade, SD
ZIP code 82712	17 mi	Beulah, WY

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 57779, plotted from its record coordinates.

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

Scope ZIP code 57779. 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.