ZIP Code 57454 — Langford, SD
57454 is a standard (street delivery) ZIP code serving Langford, South Dakota, in Marshall 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 57454 at a glance
| ZIP code | 57454 |
|---|---|
| Primary city | Langford |
| State | South Dakota (SD) |
| County | Marshall FIPS 46091 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 732 |
| Coordinates | 45.610580, -97.772860 |
How ZIP+4 works in 57454
The four digits after the hyphen encode a delivery segment inside 57454. 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 57454 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 57454.
| ZIP | City | Distance |
|---|---|---|
| 57468 | Pierpont, SD | 7.8 mi |
| 57421 | Amherst, SD | 11.6 mi |
| 57432 | Claremont, SD | 13.2 mi |
| 57261 | Roslyn, SD | 14.3 mi |
| 57430 | Britton, SD | 14.8 mi |
| 57422 | Andover, SD | 14.8 mi |
| 57247 | Lake City, SD | 16.9 mi |
| 57232 | Eden, SD | 18.8 mi |
| 57445 | Groton, SD | 19.8 mi |
| 57449 | Houghton, SD | 21.1 mi |
| 57219 | Bristol, SD | 22.3 mi |
| 57274 | Webster, SD | 23.3 mi |
Questions about 57454
What is the ZIP+4 code for 57454?
57454 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 57454, you need to look up a specific street address to get them.
What city is 57454?
57454 is assigned to Langford, South Dakota, in Marshall 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.