ZIP Code 57438 — Faulkton, SD
57438 is a standard (street delivery) ZIP code serving Faulkton, South Dakota, in Faulk 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 57438 at a glance
| ZIP code | 57438 |
|---|---|
| Primary city | Faulkton |
| State | South Dakota (SD) |
| County | Faulk FIPS 46049 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 973 |
| Coordinates | 45.068990, -99.154620 |
How ZIP+4 works in 57438
The four digits after the hyphen encode a delivery segment inside 57438. 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 57438 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 57438.
| ZIP | City | Distance |
|---|---|---|
| 57435 | Cresbard, SD | 13.8 mi |
| 57467 | Orient, SD | 16.7 mi |
| 57473 | Seneca, SD | 16.9 mi |
| 57466 | Onaka, SD | 17.4 mi |
| 57470 | Rockham, SD | 19.3 mi |
| 57465 | Northville, SD | 23.4 mi |
| 57471 | Roscoe, SD | 24.8 mi |
| 57475 | Tolstoy, SD | 25.2 mi |
| 57451 | Ipswich, SD | 27.4 mi |
| 57460 | Mansfield, SD | 27.7 mi |
| 57455 | Lebanon, SD | 29 mi |
| 57469 | Redfield, SD | 31.7 mi |
Questions about 57438
What is the ZIP+4 code for 57438?
57438 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 57438, you need to look up a specific street address to get them.
What city is 57438?
57438 is assigned to Faulkton, South Dakota, in Faulk 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.