| movie | Hoppers (2026)As Flock of Birds / Additional Voices (voice) | (Not seen) |
| movie | Demetri Martin: Demetri Deconstructed (2024)As Himself | (Not seen) |
| movie | Weird: The Al Yankovic Story (2022)As Tiny Tim | (Not seen) |
| movie | We Bare Bears: The Movie (2020)As Ice Bear (voice) | (Not seen) |
| movie | Demetri Martin: The Overthinker (2018)As Self | (Not seen) |
| tv | The Late Show with Stephen Colbert (2015)As Self(3 episodes) | (Not seen) |
| movie | Demetri Martin: Live (At the Time) (2015)As Self | (Not seen) |
| movie | In a World... (2013)As Louis Parker | (Not seen) |
| movie | Demetri Martin: Standup Comedian (2012)As Himself | (Not seen) |
| tv | New Girl (2011)As Juror 237B / Gary(1 episode) | (Not seen) |
| movie | Contagion (2011) (AKA "Contagion: The IMAX Experience")As David Eisenberg | (Not seen) |
| movie | Take Me Home Tonight (2011)As Carlos | (Not seen) |
| tv | Important Things with Demetri Martin (2009)As Self - Host(17 episodes) | (Not seen) |
| movie | Taking Woodstock (2009)As Elliot Teichberg | (Not seen) |
| movie | Post Grad (2009)As TV Commercial Producer | (Not seen) |
| movie | The Rocker (2008)As Kip | (Not seen) |
| tv | Flight of the Conchords (2007)As Demetri(1 episode) | (Not seen) |
| movie | Demetri Martin. Person. (2007)As Himself | (Not seen) |
| movie | Demetri Martin: If I (2004)As Himself | (Not seen) |
| movie | Analyze That (2002) (AKA "Analyze You")As Personal Assistant | (Not seen) |