ZIP Code 57446 — Hecla, SD
57446 is a standard (street delivery) ZIP code serving Hecla, South Dakota, in Brown 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 57446 at a glance
| ZIP code | 57446 |
|---|---|
| Primary city | Hecla |
| State | South Dakota (SD) |
| County | Brown FIPS 46013 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 223 |
| Coordinates | 45.866980, -98.154230 |
How ZIP+4 works in 57446
The four digits after the hyphen encode a delivery segment inside 57446. 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 57446 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 57446.
| ZIP | City | Distance |
|---|---|---|
| 57449 | Houghton, SD | 9.4 mi |
| 57432 | Claremont, SD | 14.1 mi |
| 57421 | Amherst, SD | 14.4 mi |
| 58474 | Oakes, ND | 15.8 mi |
| 57433 | Columbia, SD | 17.4 mi |
| 57441 | Frederick, SD | 17.6 mi |
| 57426 | Barnard, SD | 18.7 mi |
| 58017 | Cogswell, ND | 19.1 mi |
| 57430 | Britton, SD | 21 mi |
| 58441 | Fullerton, ND | 23.6 mi |
| 57454 | Langford, SD | 25.5 mi |
| 58436 | Ellendale, ND | 25.6 mi |
Questions about 57446
What is the ZIP+4 code for 57446?
57446 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 57446, you need to look up a specific street address to get them.
What city is 57446?
57446 is assigned to Hecla, South Dakota, in Brown 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.