St. Onge ZIP code, South Dakota
The ZIP code for St. Onge, SD is 57779, and its area code is 605.
- USPS city name
- 1 ZIP code
- Population
- 40
- Area code
- 605
- County
- Lawrence County
- State
- South Dakota
Also written Saint Onge, the spelling the Postal Service uses.
NANPA lists no telephone rate centre for St. Onge itself, so these are the area codes of the nearest one, Spearfish (7.4 miles). A town on an area-code boundary can differ from its neighbour.
ZIP codes addressed as Saint Onge
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
57779 | Saint Onge , SD | Standard | 347 | — | $286,400 |
Map of St. Onge ZIP codes
The ZIP codes of St. Onge, SD, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near St. Onge
The nearest larger towns are Spearfish (12,930 people, 6.1 mi), Whitewood (912 people, 7.0 mi) and Crook City (279 people, 8.3 mi).
| Town | Population | Distance |
|---|---|---|
| Spearfish | 12,930 | 6.1 mi |
| Belle Fourche | 5,804 | 10.7 mi |
| Lead | 3,006 | 13.5 mi |
| Sturgis | 7,086 | 14.3 mi |
More nearby: every ZIP code in Lawrence County · South Dakota ZIP codes
Cite this page
zipcodes.pro. “St. Onge, SD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/sd/st-onge
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