ZIP Codes Near 57339 — Fort Thompson, SD
There are 7 ZIP codes within 25 miles of 57339, covering 7 cities and towns. Distances are straight-line between ZIP centroids, not driving distance.
Cities within 25 miles
| City | Distance | ZIP codes |
|---|---|---|
| Lower Brule, SD | 7.5 mi | 1 |
| Stephan, SD | 9.4 mi | 1 |
| Reliance, SD | 18.1 mi | 1 |
| Gann Valley, SD | 19.4 mi | 1 |
| Chamberlain, SD | 20.6 mi | 1 |
| Oacoma, SD | 21.0 mi | 1 |
| Kennebec, SD | 23.8 mi | 1 |
All 7 ZIP codes, by distance
| ZIP | City | County | Distance |
|---|---|---|---|
| 57548 | Lower Brule, SD | Lyman | 7.5 mi |
| 57346 | Stephan, SD | Hyde | 9.4 mi |
| 57569 | Reliance, SD | Lyman | 18.1 mi |
| 57341 | Gann Valley, SD | Buffalo | 19.4 mi |
| 57325 | Chamberlain, SD | Brule | 20.6 mi |
| 57365 | Oacoma, SD | Lyman | 21.0 mi |
| 57544 | Kennebec, SD | Lyman | 23.8 mi |
How this list is calculated
Each ZIP code is represented by a single centroid point, and distance is measured great-circle from the centroid of 57339 to each of the others. Two consequences worth knowing about:
- Large rural ZIPs distort the picture. A ZIP covering 400 square miles has a centroid that may be 15 miles from its own nearest edge, so a code listed as 30 miles away can begin much closer.
- These are not driving distances. A river, a bay, or a mountain range makes a 12-mile straight line into a 40-minute drive. For service-area planning, use this as a first cut and check the routes.
If you need this programmatically — for a store locator, a delivery zone, or a territory map — the radius endpoint returns the same data as JSON, with an arbitrary radius and optional state filtering.
Back to 57339
County, time zone, area codes, and the full ZIP+4 lookup for any address in Fort Thompson.