William Porter may refer to:
Law and politics William Dennison Porter (1810–1883), South Carolina lieutenant governor William Porter (Attorney General) (1805–1880), attorney-general of the Cape Colony William Field Porter (1784–1869), New Zealand politician William G. Porter, American police officer William J. Porter (1914–1988), American diplomat; former ambassador to Canada and Saudi Arabia, among others William Archer Porter (1825–1890), British lawyer and educationist William Haldane Porter (1867–1944), British civil servant William Porter (died c. 1593), member (MP) of the Parliament of England for Grantham, Bletchingley, and Helston William Porter (fl. 1388), member of parliament (MP) for Southwark William Porter (died 1436), MP for Cambridgeshire William W. Porter (1856–1928), American attorney and legal author William Wood Porter (1826–1907), American military officer and jurist William Thomas Porter (1877–1928), British barrister and colonial judge
Medicine William Townsend Porter (1862–1949), American physician, physiologist, and medical educator William Henry Porter (surgeon) (1790–1861), president of the Royal College of Surgeons in Ireland
Military officers William D. Porter (1808–1864), flag officer of the United States Navy USS William D. Porter (DD-579), ship named after him William N. Porter (1886–1973), U.S. Army Major General and chief of the Army Chemical Warfare Service during World War II William Wood Porter (1826–1907), American military officer and jurist
Music William Porter (organist) (born 1946), American organist and improviser Willy Porter (born 1964), American singer-songwriter Billy Porter (William Ellis Porter II, born 1969), American singer, actor, writer and director
Religion William Porter (bishop) (1887–1966), English Roman Catholic archbishop in present-day Ghana William Henry Porter (writer) (1817–1861), American minister and writer
Others William H. Porter (1861–1926), banker in New York City William Porter (hurdler) (1926–2000), American track and field hurdler William Porter (hurdler, born 1973), American hurdler, bronze medalist in the 400 m hurdles at the 1992 World Junior Championships in Athletics William Sydney Porter (1862–1910), American writer who used the pen name O. Henry William Sydney Porter Elementary School, school in Greensboro, North Carolina William T. Porter (1809–1858), American writer and founder of Spirit of the Times William A. Porter (1928–2015), American businessman and entrepreneur, founder of E*TRADE Bill Porter (salesman) (William Douglas Porter, 1932–2013), American salesman with cerebral palsy Willie Porter (English footballer) (William Alfred Porter, 1884–?) Willie Porter (Scottish footballer) (William Porter, fl. 1913–24) Will Porter (William Porter, born 1998), English rugby union player
See also Bill Porter (disambiguation) Billy Porter (disambiguation) Willie Porter (disambiguation)