William Dwyer
William Dwyer may refer to:
- William Dwyer (Irish politician), Irish independent politician
- Bill Dwyer (mobster), American Prohibition-era gangster
- Bil Dwyer, American cartoonist and humorist
- William Lee Dwyer, U.S. federal judge
- Ubi Dwyer, Windsor Free Festival organiser
- Bil Dwyer, American actor and comedian
- William A. Dwyer Jr., American lawyer, judge, and politician from Philadelphia
- William Gerard Dwyer, American mathematician
- Bill Dwyer (sprinter), winner of the 60 yards at the 1949 USA [Indoor Track and Field Championships]
- Bill Dwyer, English comedian in the double act Clapham and Dwyer