On March 17 1967
March 17, 1967: Winston-Salem State, led by most outstanding player Earl Monroe and coached by Clarence “Big House” Gaines, becomes the first historically black institution to win an NCAA basketball title (College Division champion).
Sources:
Sources: “In the Arena: The NCAA’s First Century” by Joseph N. Crowley, NCAA News and Champion magazine archives, the NCAA Media Center, and NCAA record books