Gann ValleySD
Home to 6 people, the town was settled in 1885.
Is Gann Valley a good place to live?
100% of households own their home in Gann Valley, above both South Dakota’s towns (68%) and U.S. towns (73%). Gann Valley has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
6 people, and everyone knows the way
In a town this size, neighbors are the best guide. Ask them anything.
The data
Ordered by what stands out in Gann Valley.
Gann Valley has a high natural-hazard risk, chiefly from cold waves
The natural-hazard score from FEMA in Gann Valley is 74 of 100. FEMA puts 55% of the town’s expected hazard losses down to cold waves, and 25% to inland flooding.
FEMA National Risk Index · OpenFEMA
Expect snowy winters and pleasant summers in Gann Valley
A winter brings about 41 inches of snow, with January nights at 8° and July afternoons at 86°.
Typical low → high °F
NOAA U.S. Climate Normals, 1991–2020
More of Gann Valley’s adults smoke cigarettes than in the typical South Dakota or U.S. town
Only one of the 36 South Dakota towns we compare has a higher share of adults who have high blood pressure than Gann Valley. For adults here, the share who get no exercise outside work is 35%. The town does better than the South Dakota average on 2 of 26 CDC measures and worse on 16.
| Gann Valley | South Dakota towns | U.S. towns | |
|---|---|---|---|
| Smoke cigarettes (CDC PLACES) | 23% | 14% | 14% |
| Diabetes (CDC PLACES) | 17% | 10% | 12% |
| Get no exercise (CDC PLACES) | 35% | 22% | 25% |
| Fair or poor health (CDC PLACES) | 27% | 16% | 19% |
| What stands out | Gann Valley | SD |
|---|---|---|
| Fewer binge drinkers | 15.6% | 18.8% |
| More adults treating high blood pressure | 80% | 75.9% |
| More older adults who have lost all their teeth | 27.9% | 12.7% |
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Everything we know about Gann Valley
Moving to Gann Valley: who provides what
Gann Valley is unincorporated, so Buffalo County and regional agencies provide most services.
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Aug 3, 2026.
Colleges nearby
None within 15 miles of Gann Valley; the nearest are
About 0 of every 100 Gann Valley residents are enrolled in college, against 5 across South Dakota.
About Gann Valley
Unincorporated community in South Dakota, United States
Gann Valley is a census-designated place in and the county seat of Buffalo County, South Dakota, United States. The town had a population of 10 as of the 2020 census. It is the smallest unincorporated county seat in the United States.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
- Established
- 1885
- Elevation
- 1,604 ft
- ZIP code
- 57341
- Area code
- 605
Questions about Gann Valley
Short answers, built from the data on this page.
Is Gann Valley, SD a good place to live?
Gann Valley has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
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