John Finnegan
- Born
- 18 August 1926 (85 years old)
- Passed away
- 29 July 2012
- Place of birth
- New York City, New York, USA
- Gender
- Male
John P. "J.P." Finnegan was an American film and television actor, mostly known for his recurrent role on the American crime fiction series Columbo. He voiced the villainous character Warren T. Rat in the 1986 Don Bluth film An American Tail.
