100 Smallest ZIP Codes in the United States by Population in Gregory County, South Dakota
Explore the 100 smallest ZIP codes in the United States ranked by population using U.S. Census demographic data. This page lists ZIP codes located in Gregory County, South Dakota.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 57571 | SAINT CHARLES | SD | 31 |
| 2 | 57335 | FAIRFAX | SD | 227 |
| 3 | 57538 | HERRICK | SD | 258 |
| 4 | 57529 | DALLAS | SD | 271 |
| 5 | 57317 | BONESTEEL | SD | 641 |
| 6 | 57523 | BURKE | SD | 968 |
| 7 | 57533 | GREGORY | SD | 1,697 |