ZIP Code 57243 — Henry, SD
57243 is a standard (street delivery) ZIP code serving Henry, 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 57243 at a glance
| ZIP code | 57243 |
|---|---|
| Primary city | Henry |
| State | South Dakota (SD) |
| County | Codington FIPS 46029 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 549 |
| Coordinates | 44.911770, -97.420720 |
How ZIP+4 works in 57243
The four digits after the hyphen encode a delivery segment inside 57243. 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 57243 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 57243.
| ZIP | City | Distance |
|---|---|---|
| 57236 | Garden City, SD | 9.8 mi |
| 57242 | Hazel, SD | 10 mi |
| 57235 | Florence, SD | 12 mi |
| 57271 | Vienna, SD | 12.8 mi |
| 57272 | Wallace, SD | 13 mi |
| 57225 | Clark, SD | 15.1 mi |
| 57201 | Watertown, SD | 16 mi |
| 57217 | Bradley, SD | 17 mi |
| 57241 | Hayti, SD | 17.8 mi |
| 57221 | Bryant, SD | 21.1 mi |
| 57278 | Willow Lake, SD | 22.3 mi |
| 57223 | Castlewood, SD | 24.6 mi |
Questions about 57243
What is the ZIP+4 code for 57243?
57243 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 57243, you need to look up a specific street address to get them.
What city is 57243?
57243 is assigned to Henry, 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.