ZIP Codes Near 82604 — Casper, WY
There are 4 ZIP codes within 25 miles of 82604, covering 4 cities and towns. Distances are straight-line between ZIP centroids, not driving distance.
Cities within 25 miles
| City | Distance | ZIP codes |
|---|---|---|
| Natrona, WY | 5.4 mi | 1 |
| Mills, WY | 17.7 mi | 1 |
| Casper, WY | 21.0 mi | 1 |
| Powder River, WY | 23.2 mi | 1 |
All 4 ZIP codes, by distance
| ZIP | City | County | Distance |
|---|---|---|---|
| 82646 | Natrona, WY | Natrona | 5.4 mi |
| 82644 | Mills, WY | Natrona | 17.7 mi |
| 82601 | Casper, WY | Natrona | 21.0 mi |
| 82648 | Powder River, WY | Natrona | 23.2 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 82604 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 82604
County, time zone, area codes, and the full ZIP+4 lookup for any address in Casper.