The 2018–19 Arizona Wildcats men's basketball team represented the University of Arizona during the 2018–19 NCAA Division I men's basketball season. The team was led by 10th-year head coach Sean Miller and played their home games at McKale Center in Tucson, Arizona as members of the Pac-12 Conference. They finished the season 17–15, 8–10 in Pac-12 play to finish in three-way tie for 6th place. They received the 9-seed in the 2019 Pac-12 tournament, where they lost to 8-seed USC in the first round, 65–78.