Joseph Donald Walsh Jr., better known as Donnie Walsh (born March 1, 1941 in New York City) is a former professional basketball coach, and currently the president of basketball operations for the New York Knicks.

Walsh attended Fordham Preparatory School in The Bronx, New York. Walsh played college basketball at the University of North Carolina for legendary coaches Frank McGuire and Dean Smith and was selected by the Philadelphia Warriors in the NBA draft, but never played in the NBA. Walsh earned both a bachelor's degree and a law degree at UNC. He turned down opportunities to practice law in order to coach basketball.

Walsh served as an assistant coach for several college teams, including twelve seasons at the University of South Carolina, working with McGuire who was the Gamecocks' head coach. From there Walsh was hired as an assistant with the Denver Nuggets by Larry Brown. He became the head coach of the Nuggets in 1979 and held the position for a year and a half, being replaced with Doug Moe in 1980. In 1984, he became an assistant with the Indiana Pacers.