ZIP Code 57538 — Herrick, SD
57538 is a standard (street delivery) ZIP code serving Herrick, South Dakota, in Gregory 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 57538 at a glance
| ZIP code | 57538 |
|---|---|
| Primary city | Herrick |
| State | South Dakota (SD) |
| County | Gregory FIPS 46053 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 236 |
| Coordinates | 43.121670, -99.155510 |
How ZIP+4 works in 57538
The four digits after the hyphen encode a delivery segment inside 57538. 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 57538 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 57538.
| ZIP | City | Distance |
|---|---|---|
| 57571 | Saint Charles, SD | 6.4 mi |
| 57317 | Bonesteel, SD | 8.9 mi |
| 57523 | Burke, SD | 9.4 mi |
| 68755 | Naper, NE | 13.8 mi |
| 57335 | Fairfax, SD | 19.8 mi |
| 68722 | Butte, NE | 19.9 mi |
| 57533 | Gregory, SD | 20.3 mi |
| 57529 | Dallas, SD | 22.2 mi |
| 57369 | Platte, SD | 23.5 mi |
| 68753 | Mills, NE | 24.4 mi |
| 57342 | Geddes, SD | 24.5 mi |
| 68759 | Newport, NE | 27.2 mi |
Questions about 57538
What is the ZIP+4 code for 57538?
57538 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 57538, you need to look up a specific street address to get them.
What city is 57538?
57538 is assigned to Herrick, South Dakota, in Gregory 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.