William Flynn
William, Bill or Billy Flynn may refer to:
Arts and entertainment
- Billy Flynn , fictional lawyer from the musical Chicago
- Bill Flynn, South African film and theater actor and comedian
- Billy Flynn , American Chicago blues guitarist
- Billy Flynn , American actor
Law and politics
- William J. Flynn, American director of the Bureau of Investigation
- William S. Flynn, American politician; governor of Rhode Island
- Bill Flynn , American politician in the Florida House of Representatives
- Bill Flynn , American politician in the New Jersey General Assembly
- Bill Flynn , Queensland MP and leader of One Nation
Sports
- William Flynn , American golf course architect
- William Flynn , American football coach
- Bill Flynn , Australian rules footballer
- William J. Flynn , American college athletics administrator
Others
- William J. Flynn , American businessman and activist for peace in Northern Ireland
- William "Billy" Flynn, responsible for the murder of Gregory Smart, the husband of Pamela Smart