ZIP Code 57237 — Gary, SD
57237 is a standard (street delivery) ZIP code serving Gary, South Dakota, in Deuel 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 57237 at a glance
| ZIP code | 57237 |
|---|---|
| Primary city | Gary |
| State | South Dakota (SD) |
| County | Deuel FIPS 46039 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 731 |
| Coordinates | 44.793230, -96.519910 |
How ZIP+4 works in 57237
The four digits after the hyphen encode a delivery segment inside 57237. 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 57237 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 57237.
| ZIP | City | Distance |
|---|---|---|
| 57226 | Clear Lake, SD | 10 mi |
| 57218 | Brandt, SD | 10.1 mi |
| 56220 | Canby, MN | 11.9 mi |
| 56257 | Marietta, MN | 13.4 mi |
| 57259 | Revillo, SD | 14.5 mi |
| 57213 | Astoria, SD | 15.3 mi |
| 57268 | Toronto, SD | 17.5 mi |
| 57238 | Goodwin, SD | 17.6 mi |
| 57265 | Strandburg, SD | 19.1 mi |
| 57246 | Labolt, SD | 19.6 mi |
| 56280 | Porter, MN | 20.5 mi |
| 57245 | Kranzburg, SD | 20.7 mi |
Questions about 57237
What is the ZIP+4 code for 57237?
57237 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 57237, you need to look up a specific street address to get them.
What city is 57237?
57237 is assigned to Gary, South Dakota, in Deuel 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.