ZIP Code 57766 — Oral, SD
57766 is a standard (street delivery) ZIP code serving Oral, South Dakota, in Fall River 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 57766 at a glance
| ZIP code | 57766 |
|---|---|
| Primary city | Oral |
| State | South Dakota (SD) |
| County | Fall River FIPS 46047 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 176 |
| Coordinates | 43.357720, -103.182520 |
How ZIP+4 works in 57766
The four digits after the hyphen encode a delivery segment inside 57766. 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 57766 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 57766.
| ZIP | City | Distance |
|---|---|---|
| 57782 | Smithwick, SD | 7.3 mi |
| 57722 | Buffalo Gap, SD | 12.2 mi |
| 57763 | Oelrichs, SD | 16.7 mi |
| 57747 | Hot Springs, SD | 17.2 mi |
| 57738 | Fairburn, SD | 21.2 mi |
| 57764 | Oglala, SD | 23 mi |
| 57773 | Pringle, SD | 26.3 mi |
| 57744 | Hermosa, SD | 30 mi |
| 57770 | Pine Ridge, SD | 34 mi |
| 57730 | Custer, SD | 34.1 mi |
| 69337 | Chadron, NE | 35.2 mi |
Questions about 57766
What is the ZIP+4 code for 57766?
57766 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 57766, you need to look up a specific street address to get them.
What city is 57766?
57766 is assigned to Oral, South Dakota, in Fall River 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.