ZIP Code 57201 — Watertown, SD
57201 is a standard (street delivery) ZIP code serving Watertown, South Dakota, in Codington 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 57201 at a glance
| ZIP code | 57201 |
|---|---|
| Primary city | Watertown |
| State | South Dakota (SD) |
| County | Codington FIPS 46029 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 26,781 |
| Coordinates | 44.934120, -97.094240 |
How ZIP+4 works in 57201
The four digits after the hyphen encode a delivery segment inside 57201. 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 57201 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 57201.
| ZIP | City | Distance |
|---|---|---|
| 57245 | Kranzburg, SD | 9 mi |
| 57238 | Goodwin, SD | 12.1 mi |
| 57235 | Florence, SD | 14.2 mi |
| 57263 | South Shore, SD | 14.9 mi |
| 57265 | Strandburg, SD | 15.1 mi |
| 57243 | Henry, SD | 16 mi |
| 57223 | Castlewood, SD | 16 mi |
| 57242 | Hazel, SD | 17 mi |
| 57241 | Hayti, SD | 17.4 mi |
| 57264 | Stockholm, SD | 18.7 mi |
| 57226 | Clear Lake, SD | 20.8 mi |
| 57272 | Wallace, SD | 21.9 mi |
Questions about 57201
What is the ZIP+4 code for 57201?
57201 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 57201, you need to look up a specific street address to get them.
What city is 57201?
57201 is assigned to Watertown, South Dakota, in Codington 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.