ZIP Code 57571 — Saint Charles, SD
57571 is a standard (street delivery) ZIP code serving Saint Charles, South Dakota, in Gregory 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 57571 at a glance
| ZIP code | 57571 |
|---|---|
| Primary city | Saint Charles |
| State | South Dakota (SD) |
| County | Gregory FIPS 46053 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 22 |
| Coordinates | 43.041520, -99.090420 |
How ZIP+4 works in 57571
The four digits after the hyphen encode a delivery segment inside 57571. 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 57571 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 57571.
| ZIP | City | Distance |
|---|---|---|
| 57538 | Herrick, SD | 6.4 mi |
| 68755 | Naper, NE | 8.4 mi |
| 57317 | Bonesteel, SD | 8.4 mi |
| 68722 | Butte, NE | 13.8 mi |
| 57523 | Burke, SD | 15.9 mi |
| 57335 | Fairfax, SD | 16.1 mi |
| 68753 | Mills, NE | 22.9 mi |
| 68759 | Newport, NE | 23.6 mi |
| 68777 | Spencer, NE | 23.9 mi |
| 57342 | Geddes, SD | 24.2 mi |
| 68719 | Bristow, NE | 26.6 mi |
| 57533 | Gregory, SD | 26.7 mi |
Questions about 57571
What is the ZIP+4 code for 57571?
57571 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 57571, you need to look up a specific street address to get them.
What city is 57571?
57571 is assigned to Saint Charles, South Dakota, in Gregory 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.