John Ellis may refer to:

• John Ellis (scrivener) (1698–1791), English political writer
• John Ellis (naturalist) (1710–1776), English botanical illustrator
• John Ellis (physicist, born 1946), British theoretical physicist at CERN
• John Millott Ellis (1831–1894), abolitionist and President of Oberlin College
• R. John Ellis (born 1935), British biochemist
• Sir John Ellis (physician) (1916–1998), Dean London Hospital Medical College 1968–1980 medical educationalist
• John Ellis (media academic) (born 1952), British media theorist and TV producer
• John Ellis (physicist, born 1963), British physicist at the University of Cambridge

• Alfred John Ellis (1915–2020), Canadian banker
• John Ellis (businessman) (1789–1862), Director of the Midland Railway in the UK and MP for Leicester 1848–1852
• John Devonshire Ellis (1824–1906), English steelmaker
• John Prescott Ellis (born 1953), media consultant and first cousin of U.S. President George W. Bush
• Dr. John Ellis (Valvoline founder) (1815–1896), founder of the motor oil company, Valvoline

• John Ellis (guitarist) (born 1952), founding member of the 1970s punk band The Vibrators
• John Ellis (saxophonist) (born 1974), New Orleans jazz musician
• John Ellis, member of the South African band Tree63

• John Ellis (MP for New Romney)
• John Ellis (Harwich MP) (1643–1738), English administrator and MP for Harwich 1702–08
• John Ellis (Newry MP) (1812–?), Irish Member of UK Parliament for Newry
• Sir John Whittaker Ellis (1829–1912), British Member of Parliament for Mid Surrey 1884–1885, Kingston 1885–1892
• John Ellis (Fianna Fáil politician) (born 1952), Irish Fianna Fáil politician
• John Ellis (Liberal politician) (1841–1910), British Liberal politician, MP for Rushcliffe 1885–1910
• John Ellis (pastoralist) (1803–1873), "Captain Ellis" South Australian grazier and MLC
• John Ellis (Australian politician) (1872–1945), Victorian state politician
• John Ellis (Labour politician) (1930–2019), British Labour Party politician, MP for Bristol North West and for Brigg and Scunthorpe
• John Valentine Ellis (1835–1913), Canadian MP and Senator
• John William Ellis (1853–1918), New Zealand businessman and mayor of Hamilton
• John Willis Ellis (1820–1861), North Carolina governor
• E. John Ellis (1840–1889), U.S. Representative from Louisiana
• John Ellis Martineau (1873–1937), governor of Arkansas then United States District Court judge
• Johnny Ellis (1960–2022), Democratic member of the Alaska Senate

• John Ellis (theologian) (1606?–1681), English priest
• John Ellis (antiquarian) (1634–1735), Welsh priest, rector of Llanbedr-y-Cennin
• John Ellis (religious writer) (1598/99–1665), Welsh priest
• John Tracy Ellis (1905–1992), Catholic Church historian
• John Ellis (chaplain) (born 1963), Chaplain in Chief of the Royal Air Force

• John Ellis (executioner) (1874–1932), British executioner
• John Ellis (trade unionist) (1939–2011), British trade union leader
• John G. Ellis, English architect
• John R. Ellis, American visual effects artist
• J. Breckenridge Ellis (1870–1956), American writer

• John Allis (born 1942), American cyclist
• Jack Ellis (disambiguation)
• John Ellys (1701–1757), English portrait-painter
• John Ellys (Caius) (1634?–1716), English academic, Master of Gonville and Caius College, Cambridge from 1703
• John Scott-Ellis, 9th Baron Howard de Walden (1912–1999), British peer, landowner, and thoroughbred racehorse owner and breeder

This disambiguation page lists articles about people with the same name.
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