2020–21 ASUN Conference men's basketball season

The 2020–21 ASUN 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. It was the 43rd season of ASUN Conference basketball. This season was also the first ASUN season for Bellarmine, which started a transition from NCAA Division II when it joined the ASUN on July 1, 2020.

Preseason awards
Preseason awards were announced by the league office on November 5, 2020.

Preseason men's basketball coaches poll
(First place votes in parentheses)
 * 1) Lipscomb (5) 74
 * 2) Liberty (2) 66
 * 3) Stetson (1) 64
 * 4) North Florida (1) 56
 * 5) FGCU 45
 * 6) North Alabama 40
 * 7) Jacksonville 29
 * 8) Bellarmine 18
 * 9) Kennesaw State 13

Preseason men's basketball media poll
(First place votes in parentheses)
 * 1) Lipscomb (16) 256
 * 2) Liberty (10) 245
 * 3) Stetson (4) 202
 * 4) North Florida (2) 192
 * 5) FGCU 156
 * 6) North Alabama 146
 * 7) Jacksonville 108
 * 8) Kennesaw State 68
 * 9) Bellarmine 62

Honors

 * Preseason Player of the Year: Ahsan Asadullah, Lipscomb
 * Preseason Defensive Player of the Year: Elijah Cuffee, Liberty
 * Fan-Voted Preseason Player of the Year: Caleb Catto, FGCU
 * Fan-Voted Preseason Defensive Player of the Year: Alex Peterson, Kennesaw State