2020–21 Mountain West Conference basketball season

The 2020–21 Mountain West Conference men's basketball season began with practices in October 2020, followed by the start of the 2020–21 NCAA Division I men's basketball season in November. Conference play began in January 2021 and concluded in March 2021.

Preseason Awards
The preseason coaches' poll was announced by the league office on November 10, 2020.

Preseason men's basketball coaches poll
(First place votes in parentheses)
 * 1) San Diego State (14) 211
 * 2) Boise State (4) 188
 * 3) Utah State (2) 177
 * 4) UNLV 160
 * 5) Colorado State 141
 * 6) Nevada 114
 * 7) New Mexico 106
 * 8) Fresno State 93
 * 9) Wyoming 59
 * 10) Air Force 39
 * 11) San Jose State 32

Honors
Preseason honors were announced by the league office on November 10, 2020.