ZIP Code 57717 — Belle Fourche, SD
57717 is a standard (street delivery) ZIP code serving Belle Fourche, South Dakota, in Butte County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 57717 at a glance
| ZIP code | 57717 |
|---|---|
| Primary city | Belle Fourche |
| State | South Dakota (SD) |
| County | Butte FIPS 46019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 8,983 |
| Coordinates | 44.966670, -103.923960 |
How ZIP+4 works in 57717
The four digits after the hyphen encode a delivery segment inside 57717. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 57717 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 57717.
| ZIP | City | Distance |
|---|---|---|
| 57762 | Nisland, SD | 21.3 mi |
| 82710 | Aladdin, WY | 24.7 mi |
| 57776 | Redig, SD | 27.8 mi |
| 57779 | Saint Onge, SD | 28.9 mi |
| 82712 | Beulah, WY | 31.9 mi |
| 57799 | Spearfish, SD | 32.4 mi |
| 82711 | Alva, WY | 32.4 mi |
| 59319 | Capitol, MT | 32.7 mi |
| 57783 | Spearfish, SD | 34.2 mi |
| 57793 | Whitewood, SD | 35.2 mi |
Questions about 57717
What is the ZIP+4 code for 57717?
57717 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 57717, you need to look up a specific street address to get them.
What city is 57717?
57717 is assigned to Belle Fourche, South Dakota, in Butte County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.