The 2018–19 Gonzaga Bulldogs men's basketball team (also informally referred to as the Zags) represented Gonzaga University, located in Spokane, Washington.

In the WCC Tournament, they defeated Pepperdine in the semifinals before losing in the championship game to Saint Mary’s.

They received an at-large bid to the NCAA Tournament where they defeated Fairleigh Dickinson, Baylor and Florida State to make the Elite Eight.

They defeated Loyola Marymount, San Francisco and BYU to become champions of the WCC tournament.

They received the WCC's automatic bid to the NCAA tournament where they defeated UNC Greensboro and Ohio State to advance to the Sweet Sixteen where they lost to Florida State.