The 2019 Big South men's basketball tournament was the postseason men's basketball tournament that ended the 2018–19 season of the Big South Conference.
It was the first title for Gardner–Webb after 11 years in the Big South, and their first trip to the NCAA Tournament in school history.
The first round was played at campus sites at the home of the higher seed.
The quarterfinals and semifinals were played at Gore Arena in Buies Creek, North Carolina, home of regular-season champion Campbell.
The championship game was held at the Dedmon Center in Radford, Virginia, the home arena of the highest surviving seed, Radford.