1978 Southwestern Louisiana Ragin' Cajuns football team

The 1978 Southwestern Louisiana Ragin' Cajuns football team was an American football team that represented the University of Southwestern Louisiana (now known as the University of Louisiana at Lafayette) in the Southland Conference during the 1978 NCAA Division I-A football season. In their fifth year under head coach Augie Tammariello, the team compiled a 3–8 record.