John Milligan

• John J. Milligan, American lawyer, judge and political figure
• John [Colborne Milligan], Ontario lawyer, judge and political figure
• Jocko Milligan, born John Milligan, Major League Baseball player
• John Milligan (baseball), Major League Baseball player
• John F. Milligan, CEO of Gilead Sciences
• John Milligan-Whyte, American businessman, lawyer and philosopher