John Douglass

• John Douglass (bishop), English Catholic vicar-apostolic
• John J. Douglass, U.S. Representative
• John Thomas Douglass, American composer and violinist
• John W. Douglass, American military officer and politician
• John W. Douglass (politician), Maryland politician
• John W. Douglass (IRS Commissioner)
• John Watkinson Douglass, American politician
• Jack Douglass, internet personality