Michael Franzese Sr. () (né Grillo; born May 27, 1951) is an American former mobster who was a caporegime in the Colombo crime family, and son of former underboss Sonny Franzese. Franzese was enrolled in a pre-med program at Hofstra University, but dropped out to make money for his family after his father was sentenced to 50 years in prison for bank robbery in 1967. He eventually helped implement a scheme to defraud the federal government out of gasoline taxes in the early 1980s.

By the age of 35, in 1986, Fortune Magazine listed Franzese as number 18 on its list of the "Fifty Most Wealthy and Powerful Mafia Bosses". Franzese claimed that at the height of his career, he generated up to $8 million per week. In 1986, he was sentenced to 10 years in prison on conspiracy charges, released in 1989, rearrested in 1991 for a parole violation, and ultimately released in 1994. Soon after, he retired to California and is now a motivational speaker and writer.