Cronin resided in Anderson Township in the Cincinnati area with his daughter. He was married to Darlene Taylor until they divorced in 2009. Cronin's father, Hep, who lives with Mick's sister, Kelly, attends Bearcats games, frequently attends their practices and sometimes travels with the team. Cronin's mother, Peggy, died of cancer in 2005. He has a brother, Dan, who starred at Bethel College in basketball and baseball, and was drafted by the Atlanta Braves in 1988. Dan is also a cancer survivor.