The URL / Link is: https://sdlocalgov.appssd.sd.gov/
Another useful site is http://www.districtiii.org/
https://www.census.gov/quickfacts/fact/table/buffalocountysouthdakota/PST045221
https://www.city-data.com/county/Buffalo_County-SD.html
https://en.wikipedia.org/wiki/Buffalo_County,_South_Dakota
http://www.historicmapworks.com/GoogleSearchResults.php?q=buffalo%20county%20south%20dakota
https://ce.naco.org/?find=true
Crow Creek Sioux Tribe | South Dakota Department of Tribal Relations (sd.gov)