William A. Reid (September 26, 1893 – October 10, 1955) was an American basketball coach and administrator born in Detroit, Michigan. As a high school player he led his team to a state title and then played in two sports in Colgate University. He returned to Colgate as a basketball coach and coached the team from 1919 to 1928 with a record of 135–52. Beginning in 1936, he served as Colgate's director of athletics for 20 years. He was a president of Eastern College Athletic Conference (ECAC) from 1944 to 1945 and vice-president of the National Collegiate Athletic Association (NCAA) from 1942 to 1946. He was enshrined in the Basketball Hall of Fame in 1963.