| Year | Title | Role | Notes |
| 1997–2002 | Incredible Story Studios | Various | 2 episodes |
| 2002–2003 | 2030 CE | Rome Greyson | Main role |
| 2004–2006 | Renegadepress | Melanie | 4 episodes |
| 2005 | Dawn Anna | Lauren "Lulu" Dawn Townsend (age 12) | Television film |
| 2006 | Booky Makes Her Mark | Beatrice "Booky" Thomson | Television film |
| Prairie Giant | Tommy's doctor's receptionist | 2 episodes |
| Trapped! | Gwen | Television film |
| 2007 | Redemption SK | Margaret | Miniseries |
| The Robber Bride | Augusta | Television film |
| Sabbatical | Gwyneth Marlowe | Television film |
| Stir of Echoes: The Homecoming | Sammi | Television film |
| 2008 | Flashpoint | Penny | Episode: "Planets Aligned" |
| Instant Star | Zeppelin Dyer | Recurring role (season 4) |
| An Old Fashioned Thanksgiving | Mathilda Bassett | Television film |
| Would Be Kings | Reese | 2 episodes |
| 2008–2010 | Heartland | Kit Bailey | Recurring role (seasons 2–4) |
| 2009 | The Listener | Hannah Simmons | Episode: "One Way or Another" |
| 2009–2011 | Being Erica | Sarah Wexler | 4 episodes |
| 2010 | Bloodletting & Miraculous Cures | Janice | Episode: "All Souls" |
| Cra$h & Burn | Lindsay | Episode: "Closure" |
| The Nativity | Mary | 4 episodes |
| 2011 | Alphas | Tracy Beaumont | Episode: "Anger Management" |
| Certain Prey | Clara Rinker | Television film |
| 2012 | World Without End | Sister Mair | Recurring role; miniseries |
| 2013 | Cracked | Haley Coturno / Isabel Ann Fergus | Episode: "Spirited Away" |
| Parks and Recreation | Nadia Stasky | 2 episodes |
| 2013–2014 | Captain Canuck | Redcoat | Voice, 4 episodes |
| 2013–2017 | Orphan Black | Sarah Manning / Elizabeth Childs / Alison Hendrix / Cosima Niehaus / Helena / Rachel Duncan / various | Main role; also producer (seasons 3–5) |
| 2015 | BoJack Horseman | Mia McKibbin | Voice, episode: "Let's Find Out" |
| 2016 | Robot Chicken | Barbie / Flight Attendant | Voice, episode: "Hopefully Salt" |
| 2018 | Animals | Sherman | Voice, episode: "Roachella" |
| Drunk History | Emmeline Pankhurst | Episode: "Civil Rights" |
| Trollhunters: Tales of Arcadia | Queen Aja Tarron | 2 episodes |
| 2018–2019 | 3Below: Tales of Arcadia | Queen Aja Tarron / Queen Coranda | Voice, main role |
| 2020 | Perry Mason | Alice McKeegan | Main role |
| 2021 | The Harper House | Ollie Harper | Voice, main role |
| 2022 | Bite Size Halloween | Dana Capgras | Episode: "Snatched" |
| She-Hulk: Attorney at Law | Jennifer Walters / She-Hulk | Main role |
| Marvel Studios: Assembled | Herself | Episode: "The Making of She-Hulk: Attorney at Law" |
| 2023–present | Invincible | Queen Lizard / Queen Aquaria / Telia / GDA Agent / Viltrumites / Elia | Voices; recurring role |
| 2024 | The Boulet Brothers' Dragula | Herself (guest judge) | Episode: "Holiday of Horrors" |
| 2025 | Maclunkey Treasure Island: A Live Staged Reading of Star Wars – A New Hope | Princess Leia Organa | Television film |
| 2026 | Star Trek: Starfleet Academy | Anisha Mir | Recurring role |
| Maximum Pleasure Guaranteed | Paula | Main role |
