Buffalo County, South Dakota ZIP codes
2 ZIP codes are in Buffalo County, plus 4 that cross in from neighboring counties.
- ZIP codes
- 2
- Population in these ZIPs
- 1,469
- Avg. median income
- $46,100population-weighted
- Cities & towns
- 2
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ZIP codes in Buffalo County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 57339 | Fort Thompson | 1,390 | $46,136 | $121,700 |
| 57341 | Gann Valley | 79 | — | — |
ZIP codes partly in Buffalo County
These ZIP codes are mostly in a neighboring county but cover part of Buffalo County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 57325 | Chamberlain | Brule County | 3,335 | $80,139 | $254,200 |
| 57355 | Kimball | Brule County | 1,120 | $63,125 | $144,200 |
| 57362 | Miller | Hand County | 1,967 | $67,083 | $186,200 |
| 57370 | Pukwana | Brule County | 894 | $58,824 | $180,200 |
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 Buffalo County
Nearby counties
Frequently asked questions
How many ZIP codes are in Buffalo County, South Dakota?
2 ZIP codes are mainly in Buffalo County, and 4 more ZIP codes from neighboring areas reach partly into it.
What cities are in Buffalo County?
ZIP codes in Buffalo County use the city names Fort Thompson and Gann Valley.