ZIP Code 57340 — Fulton, SD
57340 is a standard (street delivery) ZIP code serving Fulton, South Dakota, in Hanson 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 57340 at a glance
| ZIP code | 57340 |
|---|---|
| Primary city | Fulton |
| State | South Dakota (SD) |
| County | Hanson FIPS 46061 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 244 |
| Coordinates | 43.793920, -97.850360 |
How ZIP+4 works in 57340
The four digits after the hyphen encode a delivery segment inside 57340. 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 57340 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 57340.
| ZIP | City | Distance |
|---|---|---|
| 57311 | Alexandria, SD | 10.7 mi |
| 57301 | Mitchell, SD | 11.1 mi |
| 57374 | Spencer, SD | 12.6 mi |
| 57337 | Fedora, SD | 14.6 mi |
| 57321 | Canova, SD | 16 mi |
| 57359 | Letcher, SD | 16.9 mi |
| 57334 | Ethan, SD | 18.8 mi |
| 57314 | Artesian, SD | 19 mi |
| 57332 | Emery, SD | 19.8 mi |
| 57349 | Howard, SD | 21.1 mi |
| 57363 | Mount Vernon, SD | 21.5 mi |
| 57058 | Salem, SD | 22.4 mi |
Questions about 57340
What is the ZIP+4 code for 57340?
57340 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 57340, you need to look up a specific street address to get them.
What city is 57340?
57340 is assigned to Fulton, South Dakota, in Hanson 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.