The 2012–13 Louisiana–Lafayette Ragin' Cajuns men's basketball team represented the University of Louisiana at Lafayette during the 2012–13 NCAA Division I men's basketball season.

The Ragin' Cajuns, led by third year head coach Bob Marlin, played their home games at the Cajundome and were members of the West Division of the Sun Belt Conference.

They finished the season 13–20, 8–12 in Sun Belt play to finish in third place in the West Division.

They lost in the quarterfinals of the Sun Belt tournament to Middle Tennessee.

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