Brian Gimmillaro (born in 1948) is an American former women's volleyball coach for California State University, Long Beach from 1985 to 2017. Before joining Long Beach State, Gimmillaro began his coaching tenure with the girls volleyball team at Gahr High School from 1978 to 1985. With Gahr, Gimmillaro's team won two CIF Southern Section divisions and one California Interscholastic Federation championship. Upon leaving for Long Beach State, he had 142 wins and 15 losses in high school volleyball.
At Long Beach State, Gimmillaro and Long Beach State won the regular season of the Big West Conference thirteen times and the NCAA Division I women's volleyball tournament three times. He received over ten Coach of the Year awards, including from the American Volleyball Coaches Association and USA Volleyball. As Long Beach State's coach, Gimmillaro accumulated 835 wins and 221 losses. With his 835 wins, Gimmillaro is in the top 25 for most overall women's volleyball wins by an NCAA Division I coach. He was given the Donald S. Shondell All-Time Great Coach award from USA Volleyball in 2003 and named into the AVCA Hall of Fame in 2008.