| Tahun | Judul | Peran | Catatan |
| 2001 | Emeril | Cherie | Episode: "Whose Life Is It Anyway?" |
| 2002 | Maybe It's Me | Cookie | Episode: "The Crazy-Girl Episode" |
| 2003 | Buffy the Vampire Slayer | Vi | Eight episodes |
| For the People | Nicole | Episode: "Nexus" |
| Undeclared | Sheila | Episode: "God Visits" |
| 2004 | One on One | Sarah | Episode: "We'll Take Manhattan" |
| Century City | Sheryl | Episode: "The Haunting" |
| Strong Medicine | Jesse's Friend | Episode: "Positive Results" |
| 2005 | Monk | Heidi Gefsky | "Mr. Monk Gets Drunk" / Episode |
| 2006 | Windfall | Danielle | Episodes:
"Changing Partners"
"Crash Into You" |
| Love, Inc. | Natalie | Episode: "Hello, Larry" |
| 2007–2013 | The Guild | Cyd Sherman/Codex | Web series / all episodes / Creator |
| 2008–2010 | The Legend of Neil | Fairy | Web series / five episodes |
| 2008 | House | Apple | "Not Cancer" / One episode |
| Retarded Policeman #7.5: Fish[3] | Herself | |
| Dr. Horrible's Sing-Along Blog | Penny | Joss Whedon web series / all episodes |
| 2009 | Roommates | Alyssa | three episodes |
| My Boys | Heather | One episode |
| Dollhouse | Mag | Episodes:
"Epitaph One"
"Epitaph Two: Return" |
| IRrelevant Astronomy | Felicia Day | Episode: "Behind the Scenes: When Galaxies Collide" |
| Lie to Me | Ms. Angela | Episode: "Tractor Man" |
| Three Rivers | Jeni | Episode: "A Roll of the Dice" |
| 2010 | A Comicbook Orange | Herself | Episode: "Felicia Day & Viking" |
| The Webventures of Justin & Alden | Herself | |
| Generator Rex | Annie | One episode: "Operation: Wingman" |
| 2011 | Dragon Age: Redemption | Tallis | Writer & co-producer |
| Generator Rex | Annie | One episode: "Haunted" |
| The Big Chew | Marjorie | YouTube production |
| Eureka | Dr. Holly Marten | 18 episodes |
| 2012–present | Supernatural | Charlie Bradbury | Episodes:
7x20: "The Girl with the Dungeons and Dragons Tattoo"
8x11: "LARP and the Real Girl"
8x20: "Pac-Man Fever"
9x04: "Slumber Party" |
| The Flog | Herself | Weekly vlog on Geek & Sundry |
| Vaginal Fantasy | Herself | Monthly hangout on Geek & Sundry |
| Tabletop | Herself | Episodes:
"Munchkin"
"Elder Sign"
"Last Night on Earth"
"The Resistance"
"Lords of Waterdeep"
"Unspeakable Words"
YouTube Internet series. |
| 2012 | Fish Hooks | Angela | Episodes:
"Send Me an Angel Fish"
"Guys' Night Out"
"Oscar is a Playa"
"Fish Prom" |
| MyMusic | Gorgol | One episode: "INVISIBLE!"
YouTube Internet series. |
| Dan Vs. | The Boss | One episode: "Dan vs. The Boss" |
| The High Fructose Adventures of Annoying Orange | Ginger/Peach | Episodes:
"Sir Juice Alot"
"Founding Fruits"
"Fruit Plane"
"Girls vs. Boys" |
| Husbands | Sexy Pizza Girl | Web series |
| My Gimpy Life | Felicia | Two episodes: "Inspirational," "Crowded"
YouTube Internet series |
| YOMYOMF | Herself | One episode: "KevJumba Takes the SAT w/ Felicia Day"
YouTube Internet series. |
| The Game Station Podcast | Herself | One episode: "Episode 27"
YouTube Internet series. |
| Rewind YouTube Style 2012 | Carly Rae Jepsen | single video |
| 2013 | Felicia's Ark | Herself | Weekly series running from 2013-04-01 to 2013-05-13.
YouTube Internet series. |
| Co-Optitude | Herself | YouTube Internet series. |
| Spellslingers | Herself | One episode: "Day[9] vs. Felicia Day"
YouTube Internet series. |
| Outlands | 84 | YouTube Internet series. |
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