ZIP Code 57028 — Flandreau, SD
57028 is a standard (street delivery) ZIP code serving Flandreau, South Dakota, in Moody 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 57028 at a glance
| ZIP code | 57028 |
|---|---|
| Primary city | Flandreau |
| State | South Dakota (SD) |
| County | Moody FIPS 46101 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 3,450 |
| Coordinates | 44.057660, -96.604430 |
How ZIP+4 works in 57028
The four digits after the hyphen encode a delivery segment inside 57028. 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 57028 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 57028.
| ZIP | City | Distance |
|---|---|---|
| 57024 | Egan, SD | 6.3 mi |
| 57065 | Trent, SD | 10.9 mi |
| 57017 | Colman, SD | 11.3 mi |
| 56164 | Pipestone, MN | 13.4 mi |
| 57026 | Elkton, SD | 14.2 mi |
| 57022 | Dell Rapids, SD | 15.6 mi |
| 56140 | Ihlen, MN | 15.6 mi |
| 57002 | Aurora, SD | 16.3 mi |
| 57057 | Rutland, SD | 17.8 mi |
| 56144 | Jasper, MN | 18.4 mi |
| 57075 | Wentworth, SD | 18.5 mi |
| 57007 | Brookings, SD | 20.1 mi |
Questions about 57028
What is the ZIP+4 code for 57028?
57028 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 57028, you need to look up a specific street address to get them.
What city is 57028?
57028 is assigned to Flandreau, South Dakota, in Moody 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.