The 2020–21 Louisiana Ragin' Cajuns men's basketball team represented the University of Louisiana at Lafayette during the 2020–21 NCAA Division I men's basketball season.

The Ragin' Cajuns, led by eleventh-year head coach Bob Marlin, played their home games at the Cajundome as members of the Sun Belt Conference.

[2] The Cajuns proceeded to the Sun Belt Conference Men's Basketball Tournament.

They ultimately lost to the Georgia Southern Eagles in heartbreaking fashion by the score of 81–82 in the second round.

Shortly after their elimination, all sporting events as well as the finale of the tournament was cancelled due to the COVID-19 pandemic.