John Corcoran
John Corcoran may refer to:
- John Corcoran , American soldier who received the Medal of Honor for valor during the American Civil War
- Jack Corcoran, American catcher in Major League Baseball
- John Corcoran , American infielder in Major League Baseball
- John H. Corcoran, Massachusetts politician who served as the mayor of Cambridge, Massachusetts
- John Corcoran , American author and spokesman for literacy programs, who set up his own foundation to help people learn to read
- John Corcoran , American philosopher and logician, University at Buffalo
- John Corcoran , American non-fiction book author, newsstand magazine editor, screenwriter and martial arts historian
- John Corcoran , Irish Gaelic games administrator
- John Corcoran , Irish hurler and Gaelic footballer
- John Corcoran , British man convicted of the murder of Helen Gorrie and then released on appeal in contentious circumstances
- John Corcoran , former Clinton White House aide, former speechwriter in the California governor's office, attorney, and blogger