Jim or James Cronin may refer to:Jim Cronin (zookeeper) (1951–2007), founder of Monkey World, Dorset, England, a sanctuary for abused and neglected primates Jim Cronin (baseball) (1905–1983), American Major League Baseball infielder Jim Cronin (soccer) (1906–1942), American soccer player James Cronin (1931–2016), American particle physicist James Cronin, Irish rugby union player James Cronin, founder of the Ceroc dance club