Joseph Xavier Carollo (born March 12, 1955) is a Cuban-American politician who served as mayor of Miami from 1996 to 1997 and again from 1998 to 2001. Following his loss in the 2001 mayoral election, he served as Doral, Florida city manager from January 2013 until his firing in April 2014. After a lawsuit by Carollo, he was reinstated as city manager in June 2017, before immediately resigning. He successfully ran for election to the Miami City Commission in 2017.
He was a candidate in the 2025 Miami mayoral election. Carollo's combative and erratic behavior in his political career earned him the name "Crazy Joe" from Miami Herald journalist and author Carl Hiaasen. The Miami New Times similarly called him "Loco Joe."