ZIP Code 57311 — Alexandria, SD
57311 is a standard (street delivery) ZIP code serving Alexandria, 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 57311 at a glance
| ZIP code | 57311 |
|---|---|
| Primary city | Alexandria |
| State | South Dakota (SD) |
| County | Hanson FIPS 46061 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,389 |
| Coordinates | 43.651120, -97.764830 |
How ZIP+4 works in 57311
The four digits after the hyphen encode a delivery segment inside 57311. 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 57311 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 57311.
| ZIP | City | Distance |
|---|---|---|
| 57332 | Emery, SD | 9.3 mi |
| 57340 | Fulton, SD | 10.7 mi |
| 57374 | Spencer, SD | 10.8 mi |
| 57334 | Ethan, SD | 13.7 mi |
| 57301 | Mitchell, SD | 14.4 mi |
| 57319 | Bridgewater, SD | 16 mi |
| 57331 | Dimock, SD | 18.6 mi |
| 57321 | Canova, SD | 18.7 mi |
| 57058 | Salem, SD | 19.1 mi |
| 57366 | Parkston, SD | 20.4 mi |
| 57337 | Fedora, SD | 24.2 mi |
| 57012 | Canistota, SD | 24.5 mi |
Questions about 57311
What is the ZIP+4 code for 57311?
57311 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 57311, you need to look up a specific street address to get them.
What city is 57311?
57311 is assigned to Alexandria, 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.