William Mack Brown (born August 27, 1951) is an American former college football coach. Brown most recently coached the North Carolina Tar Heels, where he had two stints, first from 1988 until 1997, and again from 2019 until his firing at the end of the 2024 season. During his second stint in Chapel Hill, Brown became the North Carolina football program's all-time winningest coach, passing Dick Crum for most wins in program history.