| Year | Title | Role | Notes |
| 1997 | Late Show with David Letterman | Snow Shovel Murder Victim (uncredited) | Episode: "Robert Pastorelli/Craig Kilborn/Live"; also writer |
| 2002–2010 | Saturday Night Live | Various roles | 157 episodes |
| 2002–2024 | Clone High | Abe Lincoln (voice) | 33 episodes |
| 2006 | Campus Ladies | Stuart | 2 episodes |
| Drawn Together | Kirk Cameron (voice) | Episode: "Lost in Parking Space: Part One" |
| Aqua Teen Hunger Force | Alien (voice) | Episode: "Antenna" |
| 2007 | Flight of the Conchords | Ben | Episode: "The Actor" |
| Tim and Eric Nite Live! | Emanuel Melly | Episode |
| 2007, 2010–2012 | 30 Rock | Tomas, Paul L'astnamé | 13 episodes |
| 2007–2010 | Tim and Eric Awesome Show, Great Job! | Various roles | 6 episodes |
| 2008 | Young Person's Guide to History | Comte de Buffon the Frenchman | Episode |
| 2008, 2010 | How I Met Your Mother | Randy Wharmpess | 2 episodes |
| 2009 | Sit Down, Shut Up | Stuart Proszakian (voice) | 13 episodes |
| 2009–2013 | The Cleveland Show | Principal Wally Farquhare, Various voices | 22 episodes |
| 2009–2025 | American Dad! | Various voices | 8 episodes |
| 2010 | The Life & Times of Tim | Chipper (voice) | Episode: "Unjustly Neglected Drama" |
| WWE Raw | MacGruber | 1 episode |
| Funny or Die Presents | Cast (Scott & Behr), Sleeping Celebrity | 2 episodes |
| Squidbillies | Tom Treebow | Episode: "Lean Green Touchdown Makifying Machine" |
| 2010–2013 | Conan | Ted Turner | 14 episodes |
| 2011 | Parks and Recreation | Kelly Larson | Episode: "Time Capsule" |
| Allen Gregory | Ian, Stuart Rossmyre, Sid Lampis (voice) | 7 episodes |
| 2011–2012 | Up All Night | Reed | 3 episodes |
| Kick Buttowski: Suburban Daredevil | Gordon "Gordie" Gibble (voice) | 7 episodes |
| 2011–2015 | The League | Chuck | 2 episodes |
| 2012–2013 | Comedy Bang! Bang! | Chet Barnsider, Felix Dewhurst | 2 episodes |
| 2012–2015 | Lab Rats | Eddy (voice), Human Eddy | 20 episodes |
| 2012–2016 | Gravity Falls | Tyler Cutebiker (voice) | 13 episodes |
| 2013 | Drunk History | Edwin Booth | Episode: "Washington D.C." |
| 2013–2014 | Kroll Show | Various roles | 3 episodes |
| 2013–2024 | Bob's Burgers | Kurt, Mr. Grant (voice) | 9 episodes |
| 2014–2015 | The Awesomes | Malocchio Jr. (voice) | 10 episodes |
| 2014–2022 | The Simpsons | King Toot (voice) | 3 episodes |
| 2015 | 7 Days in Hell | Sandy Pickard | Television film |
| Moonbeam City | Rad Cunningham (voice) | 10 episodes |
| 2015–2018 | The Last Man on Earth | Philip Tandy "Phil" Miller | 65 episodes; also creator, writer and executive producer |
| 2016 | Maya & Marty | Various | Episode: "Will Forte, Amy Poehler and Jerry Seinfeld" |
| 2017 | Michael Bolton's Big, Sexy Valentine's Day Special | Michael Fulton | Variety special |
| Tour de Pharmacy | Police Officer | Television film |
| Tim and Eric's Bedtime Stories | Will | Episode: "The Demotion" |
| 2019 | Future Man | CASSIN-E (voice) | Episode: "The I of the Tiger" |
| Alien News Desk | Drexx Drudlarr (voice) | 12 episodes |
| Crank Yankers | Himself (voice) | 2 episodes |
| 2019, 2023 | I Think You Should Leave with Tim Robinson | Old Man on Plane / The Ponytail Guy | 2 episodes |
| 2020 | Who Wants to Be a Millionaire | Himself | Contestant; 2 episodes |
| The Shivering Truth | (voice) | Episode: "Holeways" |
| Flipped | Jann Melfi | 11 episodes |
| Hoops | Dawa (voice) | Episode: "Zen" |
| 2020–2022 | Late Night with Seth Meyers | Sea Captain (voice) | Uncredited |
