5 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 57223 | Castlewood | 1,367 |
| 57221 | Bryant | 1,185 |
| 57248 | Lake Norden | 1,150 |
| 57241 | Hayti | 945 |
| 57242 | Hazel | 418 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 5 ZCTAs in Hamlin County, South Dakota (US Census).