The 2019–20 Mountain West Conference men's basketball season began with practices in October 2019, followed by the start of the 2019–20 NCAA Division I men's basketball season in November.

Conference play began in December 2019 and concluded in February 2020.

On March 15, 2019, UNLV head coach Marvin Menzies was fired after three seasons.

[4] The Mountain West Men's Basketball Media Day was held at Green Valley Ranch in Henderson, Nevada.

Utah State received all 17 first-place votes in the conference media poll.