Joseph M. Marshall III (b. ca. 1946, Brulé Lakota, Sicangu Oyate) is a historian, writer, teacher, craftsman, administrator, actor, and public speaker. He was a founding board member in 1971 of Sinte Gleska University, the tribal college at the Rosebud Indian Reservation.
Marshall has published numerous non-fiction books based on Lakota oral history and culture. His book, The Day the World Ended at Little Bighorn, won the 2008 PEN/Beyond Margins Arts award.
Joseph Marshall III was born and raised on the Rosebud Indian Reservation in South Dakota, and is an enrolled member of the federally recognized Sicangu Ohate (Rosebud Sioux, Lakota) tribe. He was raised in a traditional Lakota household by his maternal grandparents, where his first language was Lakota. He grew up in the Horse Creek Community near White River (Maka Izita Wakpa, meaning "Smoking Earth River"). He learned English as a second language, and writes and publishes in English.
After college, Marshall worked primarily as an English teacher at Todd County High School in Mission, South Dakota. In 1971, Marshall was a founding board member of Sinte Gleska University, the Sicangu Lakota's tribal college located at the reservation. He later taught at the college, helping develop a Native American studies curriculum.
Marshall helped form a non-profit advocacy group for Native American students and parents. He has also worked as an educational and health programs administrator for the Rosebud Sioux Tribe. Along the way, he became a craftsman of traditional Lakota bows and arrows.
Marshall has also worked as an actor, appearing in several episodes of The Real West. He worked in the mini-series Return to Lonesome Dove, adapted from novels in the Lonesome Dove series by Larry McMurtry. His most recent role was playing the elder, Loved by the Buffalo, in the Turner Network Television mini-series Into the West.