William Cox, Will Cox, Bill Cox, or Billy Cox may refer to:
Arts and entertainment Bill Cox (folk musician) (1897–1968), American country and folk musician Billy Cox (born 1941), American bassist best known for playing with guitarist Jimi Hendrix Will Cox (actor), Australian actor associated with Independent Theatre, an Adelaide theatre company William R. Cox (1901–1988), writer of short stories and Western and mystery novels William Trevor (1928–2016), born William Trevor Cox, Irish novelist
Military William Cox (British general) (1776–1864), British general of the peninsular war, in Siege of Almeida William Ruffin Cox (1832–1919), Confederate general in the United States Civil War, later Secretary of the United States SS William R. Cox, one of three American Liberty ships William Reginald Cox (1905–1988), British Army officer William Sitgreaves Cox (1790–1874), court-martialled acting third lieutenant of the USS Chesapeake
Law William Cox (Nova Scotia lawyer) (1921–2008), president of the Canadian Bar Association William Harold Cox (1901–1988), U.S. federal judge William John Cox (born 1941), American public interest lawyer, prosecutor, author and political activist
Politicians William Cox (British politician) (1817–1889), member of parliament for Finsbury 1857–1859, 1861–1865 William Cox (governor) (born 1936), known as Bill Cox, governor of the state of Tasmania, Australia William E. Cox (1861–1942), U.S. representative from Indiana William H. Cox Jr. (born 1942), American politician from Maryland William Hopkinson Cox (1856–1950), American politician; Lieutenant Governor of Kentucky William Thomas Cox (1808/1809–1877), British politician William Wesley Cox (1865–1948), presidential, vice presidential, and perennial U.S. Senate candidate of the Socialist Labor Party
Sports William Samuel Cox (1831–1895), Australian racecourse owner, namesake of the Cox Plate Bill Cox (footballer) (1880–1915), English football centre forward William Cox (wrestler) (1884-1975), British Olympic wrestler Bill Cox (runner) (1904–1996), United States Olympic medallist William D. Cox (1909–1989), American businessman and sports executive Bill Cox (golfer) (1910–1985), author and professional golfer at Fulwell Golf Club from 1946 to 1975 Bill Cox (baseball) (1913–1988), American Major League Baseball pitcher and Illinois state legislator Billy Cox (baseball) (1919–1978), American Major League Baseball middle infielder Bill Cox (American football) (1929–2017), former American football end Bill Cox (speed skater) (born 1947), American Olympic speed skater
Others William Cox (pioneer) (1764–1837), constructor of the road across the Blue Mountains in New South Wales, Australia William Cox (1848–1907), engineer and inventor of the duplex slide rule (see Slide rule) William Denton Cox (1883–1912), heroic steward aboard RMS Titanic William George Cox (c. 1821–1878), Gold Commissioner for the Cariboo and Boundary Districts in the Colony of British Columbia, Canada William M. Cox (1942–2017), American highways administrator William Sands Cox (1802–1875), surgeon in Birmingham, England William Cox (bishop) (1921–2025), American Episcopalian bishop William T. L. Cox (born 1984), American social psychologist William T. Cox (1878–1961), American forester
See also William Cox Ellis (1787–1871), member of the United States House of Representatives from Pennsylvania George William Cox (1827–1902), British historian William Coxe (disambiguation) William Cocks (disambiguation) William Cocke (1748–1828), American lawyer