John Clark may refer to:

• John Clark or Signor Brocolini (1841–1906), Irish-born American operatic singer and actor
• John Clark (English actor) (1932–2023), English actor and theatre director
• John Clark (American actor) (1933–2011), mainly in Spaghetti Westerns
• John Clark (musician) (born 1944), American jazz horn player and composer
• John Clark (born 1978), Scottish indie/electronic musician from the band Bis who is also known as John Disco
• John Drury Clark (1907–1988), American author, chemist and rocket scientist
• John Heaviside Clark (c. 1771–1836), Scottish engraver and painter

• John Clark (spy), American spy during the American Revolutionary War
• John George Walters Clark (1892–1948), British army officer
• John W. Clark (Medal of Honor) (1830–1898), American soldier in the American Civil War

• John Clark (1785–1853), British printer and inventor
• John Brown Clark (1861–1947), mathematician, Vice President of the Royal Society of Edinburgh
• J. Desmond Clark (1916–2002), British archaeologist
• J. P. Clark (John Pepper Clark-Bekederemo, 1935–2020), Nigerian poet and professor
• John Bates Clark (1847–1938), American economist
• John Drury Clark (1907–1988), American author (as John D. Clark), chemist and rocket scientist
• John E. Clark (born 1952), American anthropologist
• John Frank Clark, American Africanist and professor of International Relations
• John Gordon Clark (1926–1999), Harvard psychiatrist and pioneer cult researcher
• John Maurice Clark (1884–1963), American economist
• John S. Clark (1885–1956), Scottish entomologist
• John Walter Clark (born 1935), American physicist
• John Willis Clark (1833–1910), English academic and antiquarian

• John Clark (basketball), member of the Northeastern University athletics Hall of Fame
• John Clark (boxer) (1849–1922), Irish-American bare-knuckle boxer
• Johnny Clark (1947–2020), English boxer
• John Clark (cricketer) (born 1928), Australian cricketer
• John Clark (English footballer), footballer for Bradford City and Cardiff City
• John Clark (footballer, born 1941), footballer formerly with Celtic F.C., one of the Lisbon Lions
• John Clark (footballer, born 1964), footballer formerly with Dundee United
• John Clark (motorcycle racer), British motorcycle racer
• John Clark (rugby league) (died 2011), English rugby league footballer of the 1950s and 1960s
• John Clark (Australian rower) (born 1948), Australian rower
• John Clark (New Zealand rower) (born 1944), New Zealand rower

• John Clark (physician) (1744–1805), Scottish medical practitioner in Newcastle upon Tyne
• John Clark (chaplain) (1784–1853), American clergyman who served as chaplain of the senate
• John Clark (land agent) (died 1807), Scottish writer
• John Kinzie Clark (1792–1865), trader, trapper and early settler in the Chicago area
• John Howard Clark (1830–1878), editor of The South Australian Register, 1870–1877
• John Kirkland Clark (1877–1963), New York City assistant district attorney
• John Allen Clark (1926–2001), British businessman
• John Clark (Tom Clancy character), character in Tom Clancy novels
• John Clark Jr., detective in the American television series NYPD Blue

• Jon Clark (disambiguation)
• John Bates Clark Medal, an award given by the American Economic Association
• John Clark Field, a multi-use stadium in Plano, Texas, United States
• Capt. John Clark House, a historic house near Canterbury, Connecticut, United States
• John Clark House (Clarksdale, Mississippi), a historic house in Clarksdale, Mississippi, United States
• John Clarke (disambiguation)
• John Clerk (disambiguation)
• John Clerke (disambiguation)
• Jonathan Clark (disambiguation)

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