Eagle Butte School District 20-1, is a school district with its headquarters in Eagle Butte, South Dakota. The district covers sections of Ziebach County and Dewey County. The district and the Bureau of Indian Education (BIE) jointly administer the Cheyenne-Eagle Butte School (C-EB), with the Cheyenne River Sioux Tribe being represented in the management process. The BIE categorizes the school as BIE-operated. The school and the community lie within the Cheyenne River Indian Reservation.