ZIP Code 57353 — Iroquois, SD
57353 is a standard (street delivery) ZIP code serving Iroquois, South Dakota, in Kingsbury 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 57353 at a glance
| ZIP code | 57353 |
|---|---|
| Primary city | Iroquois |
| State | South Dakota (SD) |
| County | Kingsbury FIPS 46077 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 812 |
| Coordinates | 44.369440, -97.834380 |
How ZIP+4 works in 57353
The four digits after the hyphen encode a delivery segment inside 57353. 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 57353 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 57353.
| ZIP | City | Distance |
|---|---|---|
| 57324 | Cavour, SD | 11.4 mi |
| 57231 | De Smet, SD | 12.4 mi |
| 57386 | Yale, SD | 12.6 mi |
| 57323 | Carthage, SD | 15.3 mi |
| 57350 | Huron, SD | 18.1 mi |
| 57322 | Carpenter, SD | 19.4 mi |
| 57278 | Willow Lake, SD | 20.6 mi |
| 57249 | Lake Preston, SD | 23.2 mi |
| 57314 | Artesian, SD | 23.3 mi |
| 57233 | Erwin, SD | 23.5 mi |
| 57221 | Bryant, SD | 25.1 mi |
| 57337 | Fedora, SD | 25.5 mi |
Questions about 57353
What is the ZIP+4 code for 57353?
57353 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 57353, you need to look up a specific street address to get them.
What city is 57353?
57353 is assigned to Iroquois, South Dakota, in Kingsbury 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.