ZIP Code 57037 — Irene, SD
57037 is a standard (street delivery) ZIP code serving Irene, South Dakota, in Yankton 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 57037 at a glance
| ZIP code | 57037 |
|---|---|
| Primary city | Irene |
| State | South Dakota (SD) |
| County | Yankton FIPS 46135 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 925 |
| Coordinates | 43.101460, -97.253180 |
How ZIP+4 works in 57037
The four digits after the hyphen encode a delivery segment inside 57037. 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 57037 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 57037.
| ZIP | City | Distance |
|---|---|---|
| 57070 | Viborg, SD | 7 mi |
| 57072 | Volin, SD | 8.3 mi |
| 57046 | Mission Hill, SD | 10.3 mi |
| 57067 | Utica, SD | 11.8 mi |
| 57073 | Wakonda, SD | 12 mi |
| 57036 | Hurley, SD | 12.9 mi |
| 57014 | Centerville, SD | 15.1 mi |
| 57045 | Menno, SD | 15.3 mi |
| 57078 | Yankton, SD | 16 mi |
| 57031 | Gayville, SD | 16.3 mi |
| 57040 | Lesterville, SD | 17 mi |
| 57021 | Davis, SD | 18.2 mi |
Questions about 57037
What is the ZIP+4 code for 57037?
57037 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 57037, you need to look up a specific street address to get them.
What city is 57037?
57037 is assigned to Irene, South Dakota, in Yankton 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.