Delmer William Harris (born June 18, 1937) is an American basketball coach who is currently the vice president of the Texas Legends, the NBA G League affiliate of the Dallas Mavericks.

He served as a head coach for the NBA's Houston Rockets, Milwaukee Bucks, and Los Angeles Lakers, as well as the Legends.

He was also an assistant coach for the National Basketball Association's New Jersey Nets, Chicago Bulls, Dallas Mavericks, Milwaukee Bucks, and the Houston Rockets.

He was a 3-time All-Conference basketball player for Coach Duard Walker, in addition to the Honorable Mention Little All-American recognition while at Milligan.

He also coached the Dale baseball team to a PAC title and a record of 26–7; his success built using players such as Roger Kaiser and Bob Reinhart.

Harris was coach at Earlham College in Richmond, Indiana for nine seasons, building a record of 175–70 (.714) as he led the Quakers to three Conference (2 Hoosier Collegiate Conf.

When that franchise folded, Nissalke and Harris were hired as head and assistant coach, respectively, for the NBA's Houston Rockets at the start of the 1976–77 season.

Harris led the Rockets to the NBA Finals in the 1981 season, where they were defeated by the Boston Celtics four games to two in Larry Bird's first championship.

[7] In June 2009, it was reported that Harris would step down as assistant coach to the Bulls, and retire after a career spanning 50 years.

On October 3, 2011, it was announced that Harris would take over as the head coach for the Dallas Mavericks' NBA Development League affiliate the Texas Legends.

He also served as head coach of the National Team for the CentroBasket games in El Salvador in 1974, winning the first international gold in Puerto Rico's history.

In 1994, he served as consultant for Canada and assisted head coach, Ken Shields, in the World Games in Toronto.

He was an assistant coach under Rudy Tomjanovich with the US national team in the 1998 FIBA World Championship, winning the bronze medal.

They won bronze in 2011 FIBA Americas Championship in Mar del Plata, Argentina (the first major basketball medal in the Dominic Republic's history).

[12] On February 15, 2019, Harris was named as one of two 2019 recipients of the John Bunn Award (with Harry Glickman), awarded by the Naismith Memorial Basketball Hall of Fame as a lifetime achievement honor for those "whose outstanding accomplishments have impacted the high school, college, professional and/or the international game.