The Louisiana Ragin' Cajuns men's basketball program represents intercollegiate men's basketball at the University of Louisiana at Lafayette. The school competes in the Sun Belt Conference in Division I of the National Collegiate Athletic Association (NCAA) and play home games at the Cajundome in Lafayette, Louisiana. Bob Marlin is in his thirteenth season as head coach. Louisiana has appeared in the NCAA tournament eleven times, most recently in 2023. The Ragin' Cajuns have won the Sun Belt Conference tournament title seven times.

The University of Louisiana at Lafayette is a public research university in Lafayette, Louisiana. It has the largest enrollment within the nine-campus University of Louisiana System and the second-largest enrollment in Louisiana, behind only Louisiana State University. It is classified among "R1: Doctoral Universities – Very high research activity".