| Year | Title | Role | Notes |
| 1999 | JAG | Young Sarah MacKenzie | Episode: "Second Sight" |
| 2000 | The Trial of Old Drum | Dee | TV film |
| 2001–2002 | State of Grace | Young Hannah Rayburn | Main cast; 40 episodes |
| 2002 | Presidio Med | Tara Wegman | Episode: "Good Question" |
| 2003 | Without a Trace | Siobhan Arintero | Episode: "Maple Street" |
| Boomtown | Denise Stein | Episode: "Home Invasion" |
| 2003–2006; 2013;2018–2019 | Arrested Development | Mae "Maeby" Fünke | Main cast; 79 episodes |
| 2006 | Veronica Mars | Stacy Wells | Episode: "The Rapes of Graff" |
| Not Like Everyone Else | Brandi Blackbear | TV film |
| 2007 | The Business | Screenwriting Manicurist | 2 episodes |
| 2008 | The Bad Mother's Handbook | Charlotte | TV film |
| The Starter Wife | Robin | 3 episodes |
| 2010 | The League | April | Episode: "The Expert Witness" |
| 2013 | NTSF:SD:SUV:: | Gail | Episode: "Burn After Killing" |
| 2014 | Drunk History | Frances Cleveland | Episode: "First Ladies" |
| Robot Chicken | Baroness / Lucy Pevensie /Minerva McGonagall (voice) | Episode: "G.I. Jogurt" |
| Getting On | Colleen Hoover | 4 episodes |
| 2015 | Adventure Time | Betsy Poundcake (voice) | Episode: "The Diary" |
| Broad City | Adele | Episode: "Coat Check" |
| Drunk History | Virginia Hall | Episode: "Spies" |
| 2016 | Portlandia | Mayor's Kid | Episode: "Shville" |
| Animals. | Sharon (voice) | Episode: "Rats." |
| Drunk History | Alexander Hamilton | Episode: "Hamilton" |
| 2016–2017 | Adventure Time | Charlie (voice) | 2 episodes |
| 2016–2022 | Search Party | Dory Sief | Main cast; 50 episodesAlso producerDirected episode "The Imposter" |
| 2017–2019 | Transparent | Lila | 8 episodes |
| 2017–2020 | Big Mouth | Roland (voice) | 3 episodes |
| 2018–2023 | Summer Camp Island | Blanche / Cinnamon Raisin Toast /Butter Goth (voice) | 15 episodes |
| 2019 | Living with Yourself | Maia | 2 episodes |
| 2020 | The Shivering Truth | (voice) | Episode: "Nesslessness" |
| Moonbase 8 | Alix | Episode: "Visitors" |
| 2021 | Cinema Toast | (voice) | Episode: "Warehouse Friends" |
| Pride | Madeleine Tress | Episode: "1950s: People Had Parties" |
| Ultra City Smiths | Little Grace / Woman's Voice (voice) | 5 episodes |
| 2022–2024 | The Old Man | Angela Adams | Main cast |
| 2023 | Rugrats | Trish (voice) | Episode: "Reptar Day!/Mission to the Little" |
| Scavengers Reign | Levi (voice) | 8 episodes |
| 2024–2025 | Star Wars: Skeleton Crew | Kh'ymm (voice) | 2 episodes |
| 2025 | Severance | Gwendolyn Y. | 2 episodes |
| Happy Family USA | Mona Hussein (voice) | Main cast |
| Poker Face | Kate Forster / Amelia Peek | Episode: "A New Lease on Death" |
| Lego Marvel Avengers: Strange Tails | Meryet, Train Driver (voice) | Disney + Television special |
