ZIP Codes Near 57421 — Amherst, SD
There are 13 ZIP codes within 25 miles of 57421, covering 13 cities and towns. Distances are straight-line between ZIP centroids, not driving distance.
Cities within 25 miles
| City | Distance | ZIP codes |
|---|---|---|
| Claremont, SD | 7.3 mi | 1 |
| Britton, SD | 10.2 mi | 1 |
| Langford, SD | 11.6 mi | 1 |
| Houghton, SD | 13.1 mi | 1 |
| Hecla, SD | 14.4 mi | 1 |
| Pierpont, SD | 18.9 mi | 1 |
| Cogswell, ND | 20.3 mi | 1 |
| Columbia, SD | 21.4 mi | 1 |
| Lake City, SD | 21.7 mi | 1 |
| Andover, SD | 22.6 mi | 1 |
| Groton, SD | 22.7 mi | 1 |
| Havana, ND | 23.7 mi | 1 |
| Roslyn, SD | 24.6 mi | 1 |
All 13 ZIP codes, by distance
| ZIP | City | County | Distance |
|---|---|---|---|
| 57432 | Claremont, SD | Brown | 7.3 mi |
| 57430 | Britton, SD | Marshall | 10.2 mi |
| 57454 | Langford, SD | Marshall | 11.6 mi |
| 57449 | Houghton, SD | Brown | 13.1 mi |
| 57446 | Hecla, SD | Brown | 14.4 mi |
| 57468 | Pierpont, SD | Day | 18.9 mi |
| 58017 | Cogswell, ND | Sargent | 20.3 mi |
| 57433 | Columbia, SD | Brown | 21.4 mi |
| 57247 | Lake City, SD | Marshall | 21.7 mi |
| 57422 | Andover, SD | Day | 22.6 mi |
| 57445 | Groton, SD | Brown | 22.7 mi |
| 58043 | Havana, ND | Sargent | 23.7 mi |
| 57261 | Roslyn, SD | Day | 24.6 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 57421 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 57421
County, time zone, area codes, and the full ZIP+4 lookup for any address in Amherst.