| Year | Title | Role | Notes |
| 1984 | The Paper Chase | Levitz | Episode: "Billy Pierce" |
| 1985–1986 | Foley Square | Mole | Regular cast member |
| 1985–1992 | Saturday Night Live | Various characters | Main cast (92 episodes) |
| 1991 | Tales from the Crypt | Barry Blye | Episode: "Top Billing" |
| Married... with Children | Jeff Littlehead | Episode: "Kelly Does Hollywood: Part 2" |
| 1991–present | The Simpsons | Artie Ziff, Jay Sherman, Aristotle Amadopolis, Prof. Lombardo, Various characters | Voice, 22 episodes |
| 1992, 1994 | The Larry Sanders Show | Himself | 2 episodes |
| 1993 | A League of Their Own | Ernie Capadino | Episode: "Dottie's Back" |
| 1994–1995 | The Critic | Jay Sherman | Voice, main role (23 episodes) |
| 1995 | Seinfeld | Gary Fogel | Episode: "The Scofflaw" |
| 1995, 2003 | Friends | Steve | 2 episodes |
| 1997 | The Naked Truth | Acer Predburn | Episode: "The Scoop" |
| 1997–1999 | NewsRadio | Ulysses S. GrantMike JohnsonMax Lewis | 2 episodes; Main cast member in fifth season |
| 1997 | Saturday Night Live | Host | Episode: "Jon Lovitz/Jane's Addiction" |
| 2000 | Bette | Himself | Episode: "Polterguest" |
| 2000–2001 | The Critic (webisodes) | Jay Sherman | Voice |
| 2002 | Son of the Beach | Father of B.J.'s Baby | Episode: "Bad News, Mr. Johnson" |
| 2003 | Just Shoot Me! | Roland Devereaux | Episode: "A Simple Kiss of Fate" |
| 2004–2005 | Las Vegas | Fred Puterbaugh | 3 episodes |
| 2006 | Two and a Half Men | Archie Baldwin | Episode: "The Unfortunate Little Schnauzer" |
| 2008 | Comedy Central Roast of Bob Saget | Himself | Television special |
| 2010 | WWE Raw | Himself | Guest host |
| 2011 | Comedy Central Roast of Charlie Sheen | Himself | Television special |
| 2011 | Saturday Night Live | Himself (cameo) | Episode: "Dana Carvey/Linkin Park" |
| 2011–2012 | Hot in Cleveland | Homeless man/Artie | 4 episodes |
| 2012–2015 | Mr. Box Office | Bobby Gold | Main cast member |
| 2013–2014 | New Girl | Rabbi Feiglin | 2 episodes |
| 2014 | Sing Your Face Off | Himself | Contestant |
| 2015 | Randy Cunningham: 9th Grade Ninja | Queen Gabnidine | Voice, episode: "To Smell and Back" |
| Hawaii Five-O | Barry Burns | 2 episodes |
| 2016–2018 | Animals. | Himself / Old Ben | Voice, 3 episodes |
| 2016, 2018 | The $100,000 Pyramid | Himself/Celebrity Guest | 2 episodes |
| 2017 | The New Celebrity Apprentice | Himself/Contestant | 11th place |
| Justice League Action | Sid Sharp | Voice, episode: "Superman's Pal, Sid Sharp" |
| 2017–2020 | Funny You Should Ask | Himself/Celebrity Comic | 257 episodes |
| 2018 | Insatiable | Father Schwartz | Episode 1.09 "Bad Kitty" |
| Mogulettes | Amnon | Television film |
| 2019 | The Goldbergs | Jimmie Moore | Episode: "The Wedding Singer" |
| The Cool Kids | Kip Samgood | Episode: "Kip Samgood's Biggest Fan" |
| Jackie and the Next-Neighbor Girls | Johnny Bodine | 41 episodes |
| Historical Roasts | Franklin D. Roosevelt | Episode: "Anne Frank" |
| Anything but A..Man..Da! | Michael Stein | Episode: "Pilot" |
| 2020 | Saturday Night Live | Alan Dershowitz | Episode: "Adam Driver/Halsey" |
| Bitmoji TV | Justin Bieber | Voice, episode: "Demon Bear" |
| Holey Moley | Himself/Captain Long Jon Lovitz | 3 episodes |
| Bio | Robin Schwonk | Episode 3.02 "Disgraced" |
| 2021 | The Potwins | Henry | Episode: "Blue Collar" |
| Paper Empire | Stan Katz | Episode: "The Anderson Files" |
| 2023 | The Tonight Show | George Santos | Episode: "Colin Jost/Kenya Barris" |
