Jim or James Cronin may refer to:
James John Cronin (1905–1983) was an American Major League Baseball infielder. He played for the Philadelphia Athletics during the 1929 season.
James "Jim" Michael Cronin MBE (15 November 1951 – 17 March 2007) was the founder in 1987 of Monkey World in Dorset, England, a sanctuary for abused and neglected primates. He was widely acknowledged as an international expert in the rescue and rehabilitation of abused primates, and in the enforcement of international treaties aimed at protecting them from illegal trade and experimentation.
Cronin was awarded an honorary MBE by Queen Elizabeth II in 2006 for services to animal welfare.
Cronin was born in Yonkers, New York, of Italian-Irish parents, the son of a union official. After leaving high school, he had a number of jobs in the U.S. before becoming a keeper at Bronx Zoo in the 1970s, where he discovered that he wanted to work with animals. In 1980, he moved to Kent in the UK to work in John Aspinall's zoo.
Cronin started his work with primates through working as a zoo keeper in various zoos. In 1980 he came to Britain where he acquired a job as a zoo keeper at John Aspinall's Zoo, where he perfected his skills of primate rehabilitation and care. John Aspinall had set up a breeding programme for gorillas which were an endangered species. Jim's passion for working with primates made him quite successful in his career and encouraged him to have an ambition of one day building a safe haven for mistreated primates. During his years working at John Aspinall's Zoo, he gave himself the necessary experience of dealing with apes on daily basis in his career path of working with them as well as small monkeys and their complex life necessities.