Amos Chapman (1839–1925) was a civilian scout who was awarded the Medal of Honor for gallantry while in service of the United States Army during the Indian Wars. His medal was later revoked before he died as he was a civilian, but was reinstated in 1989. He was of mixed white and Native American ancestry, and married Mary Longneck, a Cheyenne woman, maintaining Native American customs throughout his life. In 2012, he was inducted into the Oklahoma Military Hall of Fame.