ZIP Code 57255 — New Effington, SD
57255 is a standard (street delivery) ZIP code serving New Effington, South Dakota, in Roberts 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 57255 at a glance
| ZIP code | 57255 |
|---|---|
| Primary city | New Effington |
| State | South Dakota (SD) |
| County | Roberts FIPS 46109 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 488 |
| Coordinates | 45.867020, -96.949850 |
How ZIP+4 works in 57255
The four digits after the hyphen encode a delivery segment inside 57255. 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 57255 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 57255.
| ZIP | City | Distance |
|---|---|---|
| 57224 | Claire City, SD | 10.6 mi |
| 57260 | Rosholt, SD | 11.4 mi |
| 58041 | Hankinson, ND | 12.6 mi |
| 57262 | Sisseton, SD | 14.5 mi |
| 58053 | Lidgerwood, ND | 16.8 mi |
| 58030 | Fairmount, ND | 17.6 mi |
| 57270 | Veblen, SD | 18.3 mi |
| 56219 | Browns Valley, MN | 19.6 mi |
| 58058 | Mantador, ND | 21.7 mi |
| 56296 | Wheaton, MN | 23.2 mi |
| 56211 | Beardsley, MN | 23.2 mi |
| 58013 | Cayuga, ND | 23.7 mi |
Questions about 57255
What is the ZIP+4 code for 57255?
57255 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 57255, you need to look up a specific street address to get them.
What city is 57255?
57255 is assigned to New Effington, South Dakota, in Roberts 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.