Gannvalley, South Dakota
Gannvalley: Situated in central South Dakota, this small unincorporated community serves as the administrative center and county seat for Buffalo County.
About
Gannvalley is a city located in the county of Buffalo in the U.S. state of South Dakota.
Quick Facts about Gannvalley
| State | South Dakota (United States) |
| County | Buffalo County |
| Latitude & Longitude | 44.0333,-98.9879 |
| Time Zone | America/Chicago |
| Local time | 07:32:12 (6th November 2026) |
| Weather | 29℉ Cloudy 7-days weather |
Geography
Gannvalley is located at 44°1'60"N 98°59'16"W (44.0333300, -98.9878700).
Gannvalley map
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Weather
29°F
Cloudy
5 mph E
Tonight
Cloudy, with a low around 29. East wind around 5 mph.
7-Day Forecast
Gann Valley
Closest post offices linked to Gannvalley.
| Post Office Name | City | ZIP |
|---|---|---|
| Gann Valley Post Office | Gann Valley (SD) | 57341 |
Other cities in Buffalo County
Cities, towns, neighborhoods & other populated places in Buffalo County , SD.
| City Name | Population | Title |
|---|---|---|
| Fort Thompson | 1,282 | Census-designated place in Buffalo County, South Dakota, United States |