Gregory County, South Dakota ZIP codes
6 ZIP codes are in Gregory County, plus 3 that cross in from neighboring counties.
- ZIP codes
- 6
- Population in these ZIPs
- 3,849
- Avg. median income
- $62,100population-weighted
- Cities & towns
- 6
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ZIP codes in Gregory County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 57317 | Bonesteel | 573 | $50,833 | $95,000 |
| 57335 | Fairfax | 303 | $92,813 | $125,600 |
| 57523 | Burke | 1,041 | $68,750 | $214,400 |
| 57533 | Gregory | 1,674 | $58,500 | $122,400 |
| 57538 | Herrick | 236 | $46,875 | $61,400 |
| 57571 | Saint Charles | 22 | — | — |
ZIP codes partly in Gregory County
These ZIP codes are mostly in a neighboring county but cover part of Gregory County.
| ZIP code | City | State | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|---|
| 57529 | Dallas | SD | Tripp County | 245 | $75,313 | $266,300 |
| 68719 | Bristow | NE | Boyd County | 154 | — | $178,000 |
| 68755 | Naper | NE | Boyd County | 397 | $119,100 | $113,800 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Gregory County
Nearby counties
Frequently asked questions
How many ZIP codes are in Gregory County, South Dakota?
6 ZIP codes are mainly in Gregory County, and 3 more ZIP codes from neighboring areas reach partly into it.
What cities are in Gregory County?
ZIP codes in Gregory County use the city names Bonesteel, Burke, Fairfax, Gregory, Herrick and Saint Charles.