Ziebach county is located in the state of South Dakota. It encompasses a total of 1,971 miles with 9 miles being water. The population as of last census was 2,801; it’s county seat is Dupree. The majority of the county lies withing the Cheyenne River Indian Reservation, with a small portion in Standing Rock Indian Reservation. This is one of South Dakota’s five counties that lies entirely on an Indian Reservation. Please share what you love or an interest fact about Ziebach County.