Concho Indian Boarding School (also known as the Cheyenne-Arapaho Boarding School at Concho or Concho Indian School and home to the Concho Demonstration School) was a boarding school for members of the Cheyenne and Arapaho Tribes and later opened to other Native American students. It existed from 1909 to 1983. It was located in central Oklahoma, approximately 1 mile south of Concho, Oklahoma and 4 miles north of El Reno, Oklahoma. The name of the town and school is the Spanish word for "shell" and was named for the Indian agent, Charles E. Shell.