William Simmons
William Simmons may refer to:
- William Henry Simmons, English mezzotint engraver
- William Benjamin Dearborn Simmons, American organ builder
- William A. Simmons, American government official
- William J. Simmons , American ex-slave and college president
- William Simmons , Canadian politician
- William Joseph Simmons, American founder of the second Ku Klux Klan
- William Simmons , English athlete
- William W. Simmons , American IBM executive
- William J. Simmons, see List of World War II aces from the United States
- William W. Simmons , American physicist
- William Simmons , American anthropologist
- William Mark Simmons, American fantasy and horror novelist
- William T. Simmons, United States Army officer and Medal of Honor recipient
- Bill "El Wingador" Simmons, American competitive eater
- Bill Simmons, American sports columnist