ZIP Code 57331 — Dimock, SD
57331 is a standard (street delivery) ZIP code serving Dimock, South Dakota, in Hutchinson 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 57331 at a glance
| ZIP code | 57331 |
|---|---|
| Primary city | Dimock |
| State | South Dakota (SD) |
| County | Hutchinson FIPS 46067 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 231 |
| Coordinates | 43.473370, -98.046190 |
How ZIP+4 works in 57331
The four digits after the hyphen encode a delivery segment inside 57331. 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 57331 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 57331.
| ZIP | City | Distance |
|---|---|---|
| 57334 | Ethan, SD | 5.4 mi |
| 57366 | Parkston, SD | 8 mi |
| 57330 | Delmont, SD | 15.7 mi |
| 57301 | Mitchell, SD | 16.4 mi |
| 57363 | Mount Vernon, SD | 18.1 mi |
| 57376 | Tripp, SD | 18.3 mi |
| 57311 | Alexandria, SD | 18.7 mi |
| 57313 | Armour, SD | 19.4 mi |
| 57328 | Corsica, SD | 20 mi |
| 57332 | Emery, SD | 20.6 mi |
| 57052 | Olivet, SD | 21.1 mi |
| 57354 | Kaylor, SD | 22 mi |
Questions about 57331
What is the ZIP+4 code for 57331?
57331 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 57331, you need to look up a specific street address to get them.
What city is 57331?
57331 is assigned to Dimock, South Dakota, in Hutchinson 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.