John Corcoran may refer to:
John Corcoran (Medal of Honor) (1842–1919), American soldier who received the Medal of Honor for valor during the American Civil War Jack Corcoran (1858–1935), American catcher in Major League Baseball John Corcoran (baseball) (1873–1901), American infielder in Major League Baseball John H. Corcoran (1897–1945), Massachusetts politician who served as the mayor of Cambridge, Massachusetts John Corcoran (author) (born 1937), American author and spokesman for literacy programs, who set up his own foundation to help people learn to read John Corcoran (logician) (1937–2021), American philosopher and logician, University at Buffalo (SUNY) John Corcoran (martial arts) (1948–2019), American non-fiction book author, newsstand magazine editor, screenwriter and martial arts historian John Corcoran (sports administrator) (1959–2016), Irish Gaelic games administrator John Corcoran (dual player) (born 1969), Irish hurler and Gaelic footballer John Corcoran (wrongful conviction) (born c. 1971), British man convicted of the murder of Helen Gorrie and then released on appeal in contentious circumstances John Corcoran (attorney) (fl. from 1990s), former Clinton White House aide, former speechwriter in the California governor's office, attorney, and blogger
See also John Cochrane (disambiguation)