South Dakota ZIP codes
South Dakota holds 385 ZIP codes between 57001 and 57799. The tables rank the places and counties with the most codes; the guide below decodes the numbering.
Places with the most ZIP codes in South Dakota
| Place | ZIP codes |
|---|---|
| Sioux Falls | 15 |
| Rapid City | 4 |
| Huron | 2 |
| Brookings | 2 |
| Aberdeen | 2 |
| Chamberlain | 2 |
| Spearfish | 2 |
| Plankinton | 1 |
| Stickney | 1 |
| White Lake | 1 |
| Cavour | 1 |
| Hitchcock | 1 |
| Virgil | 1 |
| Wessington | 1 |
| Wolsey | 1 |
| Yale | 1 |
| Martin | 1 |
| Tuthill | 1 |
| Allen | 1 |
| Batesland | 1 |
South Dakota counties by ZIP count
| County | ZIP codes |
|---|---|
| Minnehaha | 26 |
| Brown | 14 |
| Pennington | 14 |
| Meade | 11 |
| Spink | 11 |
| Corson | 10 |
| Roberts | 9 |
| Beadle | 8 |
| Brookings | 8 |
| Grant | 8 |
Reading a South Dakota ZIP code
South Dakota holds 385 ZIP codes between 57001 and 57799, spread over 66 counties. Sioux Falls leads the state with 15 codes, ahead of Rapid City with 4. Every code here opens with the digit 5: that opening number is the national postal region South Dakota belongs to, the next two digits name the sectional center that sorts the mail, and the final two point to the local office. A ZIP+4 suffix narrows delivery to a block face. Boundaries follow carrier routes rather than city limits, which is why Sioux Falls spreads across 15 codes while some rural codes cross county lines.
Source: GeoNames postal dataset (CC BY 4.0), snapshot of 2026-07-09. Counts cover standard delivery ZIPs listed for South Dakota; unique and PO box codes may add to these totals.
Last updated: · Methodology and sources