| Year | Show | Role | Notes |
| 2004 | Comedy Lab | Eugene's Friend | Episode: "12:21" |
| 2006 | Cheap Seats | Shonda | Episode: "Evel Kneival" |
| 2008–2013 | World's Dumbest... | Herself | 88 episodes |
| 2009 | Bobby Bottleservice | | Writer Episode: "T-Shirt Ideas for Jersey Shore" |
| 2010 | Louie | Date | Episode: "Pilot" |
| The Sarah Silverman Program | Becky | Writer Episode: "Smellin' of Troy" |
| WTF with Marc Maron | | Writer TV movie |
| 2011 | Comedy Central Presents | Herself | Writer Episode: "Chelsea Peretti" |
| 2011–2012 | Parks and Recreation | Zelda | Episode: "Live Ammo" Writer (2 episodes)Story editor (season 4) |
| 2011–2013 | China, IL | Crystal Peppers / Kim Buckett | Voice, 14 episodes |
| Funny as Hell | | Writer 2 episodes |
| 2012 | The Couple | Gigi | 2 episodes |
| Hell's Kitchen | Herself | Season 10, Episode 14 |
| 2013 | The Greatest Event in Television History | Jackie Rush | Episode: "Too Close for Comfort" |
| High School USA! | Superintendent Andrea Kunssler | Voice, episode: "Janitor Day" |
| Saturday Night Live | | Writer 2 episodes |
| 2013–2015 | Comedy Bang! Bang! | Delivery Woman / Trey Booth | 2 episodes |
| Kroll Show | Herself / Various Characters | 9 episodesWriter (8 episodes)Producer (8 episodes) |
| 2013–2021 | Brooklyn Nine-Nine | Gina Linetti | Main role (seasons 1–6), guest role (season 8); 108 episodes |
| 2014 | Key & Peele | Art Show Presenter | Episode: "Dicknanigans" |
| 2015 | Gravity Falls | Darlene | Voice, episode: "Roadside Attraction" |
| Drunk History | Ann Druyan | Episode: "Space" |
| 2015–2016 | The Big Fat Quiz of Everything | Herself | 2 episodes |
| 2016 | Animals | Angela | Voice, episode: "Dogs." |
| New Girl | Gina Linetti | Episode: "Homecoming" |
| RuPaul's Drag Race All Stars | Herself | Episode: "Revenge of the Queens" |
| HarmonQuest | Deepak Chopra | Episode: "The Stone Saw Mines" |
| 2016–2018 | Future-Worm! | Ennuisha / Mean Little Girl | Voice, 3 episodes |
| 2017 | Girls | Chelsea | Episode: "All I Ever Wanted" |
| Adventure Time | Queen of Ooo | Voice, episode: "Fionna and Cake and Fionna" |
| 2017–2025 | Big Mouth | Monica Foreman-Greenwald / Cellsea | Voice, 22 episodes |
| 2018 | Alone Together | Tamra | Episode: "Pop-Up" |
| Another Period | Reporter | Episode: "Sex Nickelodeon" |
| Inside Jokes | Herself | 4 episodes |
| 2018–2019 | American Dad! | Dorothy / Angie | Voice, 2 episodes |
| 2019–2020 | The Simpsons | Piper / Lauren | Voice, 2 episodes |
| Harvey Girls Forever | Maria | Voice, 5 episodes |
| 2019–2021 | Crank Yankers | Herself | Voice, 2 episodes |
| 2020 | Search Party | Patsy Monahan | Episode: "The Whistleblower" |
| 2021–2023 | The Great North | Lara Silverblatt / Abigail | Voice, 4 episodes |
| 2022 | Nailed It! | Herself | Episode: "Slime Time" |
| 2022–2024 | Bob's Burgers | Eleanor / Chelsea | Voice, 4 episodes |
| 2023 | My Dad the Bounty Hunter | Pam | Voice |
| 2023-Present | Adventure Time: Fionna and Cake | Queenie | Voice, recurring |
| 2024 | Krapopolis | Additional Voices | Voice, episode: "A Krapwork Orange" |
| 2025 | Am I Being Unreasonable? | Savannah | 2 episodes |