ZIP Code 57066 — Tyndall, SD
57066 is a standard (street delivery) ZIP code serving Tyndall, South Dakota, in Bon Homme 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 57066 at a glance
| ZIP code | 57066 |
|---|---|
| Primary city | Tyndall |
| State | South Dakota (SD) |
| County | Bon Homme FIPS 46009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,424 |
| Coordinates | 42.988740, -97.867030 |
How ZIP+4 works in 57066
The four digits after the hyphen encode a delivery segment inside 57066. 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 57066 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 57066.
| ZIP | City | Distance |
|---|---|---|
| 57315 | Avon, SD | 9.2 mi |
| 57063 | Tabor, SD | 10.1 mi |
| 57062 | Springfield, SD | 10.5 mi |
| 57059 | Scotland, SD | 10.7 mi |
| 57354 | Kaylor, SD | 14 mi |
| 57329 | Dante, SD | 14.4 mi |
| 57040 | Lesterville, SD | 15.1 mi |
| 57376 | Tripp, SD | 16.4 mi |
| 68760 | Niobrara, NE | 17.6 mi |
| 57067 | Utica, SD | 20.3 mi |
| 57380 | Wagner, SD | 21.5 mi |
| 57078 | Yankton, SD | 21.8 mi |
Questions about 57066
What is the ZIP+4 code for 57066?
57066 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 57066, you need to look up a specific street address to get them.
What city is 57066?
57066 is assigned to Tyndall, South Dakota, in Bon Homme 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.