William McCarthy
William McCarthy may refer to:
- Bill McCarthy (Australian rules footballer), Australian rules footballer
- Bill McCarthy (baseball), American baseball player
- Bill McCarthy (NHS), Policy Director NHS England
- Bill McCarthy (politician), Australian politician
- Bill McCarthy (dual player), Irish hurler and Gaelic footballer.
- W. H. L. McCarthy, Irish–British physician and British Army officer
- William C. McCarthy, American mayor
- William J. McCarthy, American labor leader
- William T. McCarthy, American federal judge
- William McCarthy, Baron McCarthy, British politician
- William McCarthy (baseball), American baseball player