The Cheyenne River Sioux Tribe is a federally recognized Native American tribe located in South Dakota. It is part of the larger Sioux Nation and primarily resides on the Cheyenne River Indian Reservation, which covers over 4,000 square miles. The tribe's population is composed of members of the Lakota people, who have a rich cultural heritage and history. The tribe engages in various economic activities, including gaming and tourism, to support its community. It also focuses on preserving its cultural traditions, language, and practices while addressing contemporary issues such as education, health care, and economic development for its members.