John Mahoney (20 Junie 1944 - 4 Februarie 2018) was 'n Amerikaanse akteur en vervaardiger. Hy was bekend vir sy rolle in die rolprente Say Anything... (1989), Barton Fink (1991), en Flipped (2010), en in die televisiereeks Frasier (1993). 1982: Mission Hill 1987: Suspect 1987: Tin Men 1989: Say Anything... 1990: Love Hurts 1991: Barton Fink 1996: Mariette in Ecstasy 1996: Primal Fear 1996: She's the One 2001: Almost Salinas 2010: Flipped 1990: H.E.L.P. 1992: The Human Factor 1993: Frasier 1986: Trapped in Silence 1989: Dinner at Eight 1990: The Image 1991: The 10 Million Dollar Getaway 1992: The Secret Passion of Robert Clayton 1992: The Water Engine 1995: Chicago on Stage 1997: Polar Bears: Arctic Terror 2003: 50 Greatest TV Animals 2003: Atlantis: Milo's Return 2003: Behind the Couch: The Making of 'Frasier' 2004: The Mystery of Maris Continues! 2004: Bulldog Crazy 2004: A Conversation with Art Director Roy Christopher 2004: The Crane Brothers Remember Season 3 2004: The Mystery of Maris: The Break-Up Begins 2004: The Niles & Daphne Attraction 2006: Moonstruck: At the Heart of an Italian Family 2008: Just Like Family: The Making of 'Dan in Real Life' 2009: An Iconic Film Revisited: 'Say Anything...'