ZIP Code 57744 — Hermosa, SD
57744 is a standard (street delivery) ZIP code serving Hermosa, South Dakota, in Custer 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 57744 at a glance
| ZIP code | 57744 |
|---|---|
| Primary city | Hermosa |
| State | South Dakota (SD) |
| County | Custer FIPS 46033 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 2,421 |
| Coordinates | 43.777300, -103.024150 |
How ZIP+4 works in 57744
The four digits after the hyphen encode a delivery segment inside 57744. 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 57744 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 57744.
| ZIP | City | Distance |
|---|---|---|
| 57738 | Fairburn, SD | 9.5 mi |
| 57725 | Caputa, SD | 15.6 mi |
| 57703 | Rapid City, SD | 15.6 mi |
| 57751 | Keystone, SD | 20.8 mi |
| 57722 | Buffalo Gap, SD | 22.2 mi |
| 57702 | Rapid City, SD | 25.1 mi |
| 57701 | Rapid City, SD | 25.4 mi |
| 57706 | Ellsworth Afb, SD | 26.4 mi |
| 57780 | Scenic, SD | 28.2 mi |
| 57766 | Oral, SD | 30 mi |
| 57773 | Pringle, SD | 31 mi |
| 57719 | Box Elder, SD | 31.3 mi |
Questions about 57744
What is the ZIP+4 code for 57744?
57744 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 57744, you need to look up a specific street address to get them.
What city is 57744?
57744 is assigned to Hermosa, South Dakota, in Custer 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.