John Cornwell may refer to:
Jack Cornwell (1900–1916), a British boy sailor posthumously awarded the Victoria Cross for gallantry at the Battle of Jutland John J. Cornwell (1867–1953), American politician, Governor of West Virginia John Cornwell (writer) (born 1940), British journalist, author, and academic John Cornwell (footballer) (born 1964), English footballer John Cornwell (artist) (1930–2020), Australian artist
See also John Cornwall (disambiguation)