ZIP Code 57548 — Lower Brule, SD
57548 is a standard (street delivery) ZIP code serving Lower Brule, South Dakota, in Lyman 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 57548 at a glance
| ZIP code | 57548 |
|---|---|
| Primary city | Lower Brule |
| State | South Dakota (SD) |
| County | Lyman FIPS 46085 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,442 |
| Coordinates | 44.084290, -99.623730 |
How ZIP+4 works in 57548
The four digits after the hyphen encode a delivery segment inside 57548. 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 57548 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 57548.
| ZIP | City | Distance |
|---|---|---|
| 57339 | Fort Thompson, SD | 7.4 mi |
| 57346 | Stephan, SD | 14 mi |
| 57569 | Reliance, SD | 15.6 mi |
| 57544 | Kennebec, SD | 17.4 mi |
| 57365 | Oacoma, SD | 21.4 mi |
| 57325 | Chamberlain, SD | 22.9 mi |
| 57536 | Harrold, SD | 23.9 mi |
| 57540 | Holabird, SD | 26.3 mi |
| 57341 | Gann Valley, SD | 26.5 mi |
| 57568 | Presho, SD | 26.8 mi |
| 57370 | Pukwana, SD | 29.5 mi |
| 57371 | Ree Heights, SD | 30.9 mi |
Questions about 57548
What is the ZIP+4 code for 57548?
57548 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 57548, you need to look up a specific street address to get them.
What city is 57548?
57548 is assigned to Lower Brule, South Dakota, in Lyman 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.