The 2018–19 Utah State Aggies men's basketball team represented Utah State University in the 2018–19 NCAA Division I men's basketball season.

The Aggies, led by first-year head coach Craig Smith, played their home games at the Smith Spectrum in Logan, Utah as members of the Mountain West Conference.

The Aggies shared the regular-season Mountain West title with Nevada, and defeated New Mexico, Fresno State, and San Diego State to win the Mountain West tournament to earn the Mountain West's automatic bid to the NCAA tournament for their first appearance since 2011.

On March 11, 2018, head coach Tim Duryea was fired after three seasons.

On March 25, reports indicated that the school had hired South Dakota head coach Craig Smith as head coach, which was confirmed the next day.