William Cox
William Cox, Will Cox, Bill Cox, or Billy Cox may refer to:
Arts and entertainment
- Bill Cox , American country and folk musician
- Billy Cox, American bassist best known for playing with guitarist Jimi Hendrix
- Will Cox, Australian actor associated with Independent Theatre, an Adelaide theatre company
- William R. Cox, writer of short stories and Western and mystery novels
- William Trevor, Irish novelist
Military
- William Cox , British general of the peninsular war, in Siege of Almeida
- William Ruffin Cox, Confederate general in the United States Civil War, later Secretary of the United States
- William Reginald Cox, British Army officer
- William Sitgreaves Cox, court-martialled acting third lieutenant of the USS ''Chesapeake''
Law
- William Cox , past president of the Canadian Bar Association
- William Harold Cox, U.S. federal judge
- William John Cox, American public interest lawyer, prosecutor, author and political activist
Politicians
- William Cox , Member of Parliament for Finsbury 1857–1859, 1861–1865
- William Cox , known as Bill Cox, Governor of the state of Tasmania, Australia
- William E. Cox, U.S. Representative from Indiana
- William H. Cox Jr., American politician from Maryland
- William Hopkinson Cox, American politician; Lieutenant Governor of Kentucky
- William Thomas Cox, British politician
- William Wesley Cox, presidential, vice presidential, and perennial U.S. Senate candidate of the Socialist Labor Party
Sports
- Bill Cox , former American football end
- Bill Cox , American Major League Baseball pitcher and Illinois state legislator
- Bill Cox , author and professional golfer at Fulwell Golf Club from 1946 to 1975
- Bill Cox , English football centre forward
- Bill Cox , United States Olympic medallist
- Bill Cox , American Olympic speed skater
- Billy Cox , American Major League Baseball middle infielder
- William Cox, British Olympic wrestler
- William D. Cox, American businessman and sports executive
- William Samuel Cox, Australian racecourse owner, namesake of the Cox Plate
Others
- William Cox , constructor of the road across the Blue Mountains in New South Wales, Australia
- William Cox, engineer and inventor of the duplex slide rule.
- William Denton Cox, heroic steward aboard RMS Titanic
- William George Cox, Gold Commissioner for the Cariboo and Boundary Districts in the Colony of British Columbia, Canada
- William M. Cox, American highways administrator
- William Sands Cox, surgeon in Birmingham, England
- William Cox , American Episcopalian bishop
- William T. L. Cox, American social psychologist