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.

[1] 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.

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