The 2019–20 Gonzaga Bulldogs men's basketball team (also informally referred to as the Zags) represented Gonzaga University, located in Spokane, Washington, in the 2019–20 NCAA Division I men's basketball season.

They defeated San Francisco and Saint Mary's to be champions of the WCC tournament.

They earned the WCC's automatic bid to the NCAA tournament.

However, all postseason play, including the NCAA Tournament, was cancelled amid the COVID-19 pandemic, making this season the first one under Mark Few that they did not play in the NCAA Tournament.

After losing to Saint Mary's in the WCC tournament, they received an at-large bid to the NCAA tournament, where they defeated Fairleigh Dickinson in the Round of 64, Baylor in the Round of 32, and then Florida State in the Sweet Sixteen, before losing to Texas Tech in the Elite Eight.