The 2021–22 Green Bay Phoenix men's basketball team represented the University of Wisconsin–Green Bay in the 2021–22 NCAA Division I men's basketball season. The Phoenix, led by second-year head coach Will Ryan, split their home games between the Resch Center in Ashwaubenon, Wisconsin and the Kress Events Center in Green Bay, Wisconsin. The competed as members of the Horizon League. They finished the season 5–25, 4–16 in Horizon League play to finish in 11th place. They lost in the first round of the Horizon League Tournament to Detroit Mercy.