| Movie | 2002 | Insomnia | Tanya Francke | |
| Movie | 2004 | Ginger Snaps 2: Unleashed | Ginger Fitzgerald | |
| Movie | 2003 | Freddy vs. Jason | Gibb | |
| Movie | 2004 | The Last Casino | Elyse | |
| Movie | 2002 | Carrie | Tina Blake | |
| Movie | 1989 | Cousins | Chloe Hardy | |
| Movie | 1990 | Burning Bridges | Emily Morgan | |
| Movie | 1998 | Disturbing Behavior | Lindsay Clark | |
| Movie | 2004 | Ginger Snaps Back: The Beginning | Ginger Fitzgerald | |
| Movie | 2001 | Ginger Snaps | Ginger Fitzgerald | |
| Movie | 2010 | 30 Days of Night: Dark Days | Stacey | |
| Movie | 2008 | Another Cinderella Story | Bree | |
| Movie | 2009 | Beyond Sherwood Forest | Alina | |
| Movie | 2010 | Hard Ride to Hell | Kerry | |
| Movie | 2023 | It's a Wonderful Knife | Gale Prescott | |
| Movie | 2009 | Rampage | Beauty Staff #2 | |
| Movie | 2008 | Ogre | Jessica | |
| Movie | 2006 | Rapid Fire | Amber | |
| Movie | 2006 | Engaged to Kill | Maddy Lord | |
| Movie | 2010 | Sins of the Mother | Ivy | |
| Movie | 2012 | Random Acts of Romance | Bud | |
| Movie | 2013 | American Mary | Mary Mason | |
| Movie | 2011 | Vampire | Lapis Lazuli | |
| Movie | 1989 | Cold Front | Katie McKenzie | |
| Movie | 1997 | Married to a Stranger | Lacey Potter (as Katherine Isobel) | |
| Movie | 2004 | The Life | Amber Reilly | |
| Movie | 2006 | Eight Days to Live | Lucinda Klunn | |
| Movie | N/A | The Galactic Ghoul | Queen of the Toum Xaltalusia XXIII | |
| Movie | 1996 | Salt Water Moose | Josephine 'Jo' Parnell (as Katherine Isobel) | |
| Movie | 1991 | Yes Virginia, There Is a Santa Claus | Virginia O'Hanlon | |
| Movie | 2013 | Goodnight for Justice: Queen of Hearts | Lucy Truffaut | |
| Movie | 2013 | Debbie Macomber's Cedar Cove | Cecilia Rendall | |
| Movie | 2012 | The Movie Out Here | Danielle | |
| Movie | 2013 | Cinemanovels | Charlotte | |
| Movie | 2014 | See No Evil 2 | Tamara | |
| Movie | 2002 | Due East | Reba | |
| Movie | 2013 | Lawrence & Holloman | Zooey | |
| Movie | 1996 | The Prisoner of Zenda, Inc. | Fiona (as Katherine Isobel) | |
| Movie | 2004 | Show Me | Jenna | |
| Movie | 2013 | Torment | Sarah Morgan | |
| Movie | 2010 | Smoke Screen | Wife | |
| Movie | 2010 | Frankie & Alice | Paige | |
| Movie | 2009 | Hostile Makeover | Cherise Smithsonian | |
| Movie | 2009 | Killer Hair | Cherise | |
| Movie | 2008 | Mail Order Bride | Jen | |
| Movie | 2015 | 88 | Gwen | |
| Movie | 2006 | Everything's Gone Green | Heather | |
| Movie | 2023 | Mixed Baggage | Lianne | |
| Movie | 2024 | Better Off | Self | |
| Movie | 2022 | The Gift of Peace | Joyce | |
| Movie | 2003 | Falling Angels | Lou Field | |
| Movie | 2015 | The Girl in the Photographs | Janet | |
| Movie | 2002 | The Secret Life of Zoey | Kayla | |
| Movie | 2014 | Primary | Andrea | |
| Movie | 2015 | How to Plan an Orgy in a Small Town | Alice Solomon | |
| Movie | 2001 | Bones | Tia | |
| Movie | 2002 | Turning Paige | Paige Fleming | |
| Movie | 2013 | The Spirit Game | Kate Fox | |
| Movie | 2016 | Countdown | Lieutenant Julia Baker | |
| Movie | 2016 | A.R.C.H.I.E. | Brooke | |
| Movie | 2000 | Snow Day | Marla | |
| Movie | 2003 | On the Corner | Stacey Lee | |
| Movie | 2002 | Spooky House | Mona | |
| Movie | 1989 | Last Train Home | Sarah Bradshaw | |
| Movie | 2017 | Undercover Angel | Robin Bladon | |
| Movie | N/A | Origami | | |
| Movie | 2013 | Victims | Lindsay | |
| Movie | 1992 | Knight Moves | Erica Sanderson | |
| Movie | 1989 | The Last Winter | Winnie Jamison | |
| Movie | 2018 | Bad Times at the El Royale | Auntie Ruth Pugh | |
| Movie | 2016 | Iteration 1 | Anna | |
| Movie | 2007 | Goosebumps: It Came from Beneath the Sink | Kat Merton | |
| Movie | 1989 | Immediate Family | Birthday Girl | |
| Movie | 2019 | Where We Disappear | Lubov | |
| Movie | 2001 | Josie and the Pussycats | Laughing Girl | |
| Movie | 2013 | 13 Eerie | Megan | |
| Movie | 2021 | The Green Sea | Simone | |
| Movie | 2021 | The Long Island Serial Killer: A Mother's Hunt for Justice | Shannan Gilbert | |
| Movie | 1998 | Voyage of Terror | Aly Tauber | |
| Movie | 2022 | Hollywood Dreams & Nightmares: The Robert Englund Story | Self | |
| Movie | 2021 | Night of the Animated Dead | Barbara (voice) | |
| Movie | 2009 | Favourite People List | Denise Moynahan | |
| Movie | 2003 | Shot in the Face | Erin | |
| Movie | 2023 | Christmas on Cherry Lane | Olivia Sawyer | |
| Movie | N/A | Blind Owl | Lily | |
| TV Show | 2006 | Psych | Sigrid | 1 |
| TV Show | 2002 | John Doe | Shayne Pickford | 1 |
| TV Show | 1998 | First Wave | Denise | 1 |
| TV Show | 1998 | Da Vinci's Inquest | Madeline Marquetti | 2 |
| TV Show | 1985 | MacGyver | Violet | 1 |
| TV Show | 1993 | The X-Files | Lisa Baiocchi | 1 |
| TV Show | 2001 | Smallville | Sara Conroy | 1 |
| TV Show | 1995 | Children of the Dust | Young Rachel | 2 |
| TV Show | 2001 | Night Visions | Vicki (segment "Rest Stop") | 1 |
| TV Show | 1997 | Stargate SG-1 | Valencia | 1 |
| TV Show | 1995 | Goosebumps | Kat Merton | 1 |
| TV Show | 1995 | The Outer Limits | Tammy Sinclair | 1 |
| TV Show | 2011 | Endgame | Danni | 13 |
| TV Show | 2008 | Sanctuary | Sophie | 1 |
| TV Show | 2011 | Being Human | Suzanna Waite | 10 |
| TV Show | 2013 | Hannibal | Margot Verger | 9 |
| TV Show | 2013 | Cedar Cove | Cecilia Rendall | 1 |
| TV Show | 2013 | Motive | Leanne | 1 |
| TV Show | 2008 | Flashpoint | Maddie | 1 |
| TV Show | 2009 | The Assistants | Paulette Reubin | 1 |
| TV Show | 2004 | The L Word | Marci Salvatore | 1 |
| TV Show | 2007 | Heartland | Mindy Fanshaw | 1 |
| TV Show | 2008 | The Englishman's Boy | Norma Carlyle | 2 |
| TV Show | 2005 | Supernatural | Ava Wilson | 2 |
| TV Show | 2006 | Psych | Priscilla Morgenstern | 1 |
| TV Show | 2021 | Ghosts | Liz | 1 |
| TV Show | 1989 | Neon Rider | Maxine ‘Max’ Forrest (as Katie Murray) | 1 |
| TV Show | 1985 | The Ray Bradbury Theater | Mink Morris | 1 |
| TV Show | 1994 | Lonesome Dove: The Series | Francis Maitland (as Katherine Isobel) | 1 |
| TV Show | 1993 | Madison | Allysia Long | 4 |
| TV Show | 1998 | The Net | Malika (as Katherine Isobel) | 1 |
| TV Show | 1998 | Da Vinci's Inquest | Audrey | 2 |
| TV Show | 2000 | The Fearing Mind | Josie Hogan | 1 |
| TV Show | 2000 | The Immortal | Taurez | 1 |
| TV Show | 2001 | The Chris Isaak Show | Melissa | 1 |
| TV Show | 1999 | Mentors | Annie Sullivan | 1 |
| TV Show | 2002 | The Eleventh Hour | Petrel | 1 |
| TV Show | 2004 | Legend of Earthsea | Yarrow | 2 |
| TV Show | 2005 | Young Blades | Celeste Le Rue | 1 |
| TV Show | 2005 | Reunion | Courtney | 1 |
| TV Show | 2011 | Health Nutz | Jennifer | 2 |
| TV Show | 2010 | Rookie Blue | Detective Frankie Anderson | 3 |
| TV Show | 2017 | The Arrangement | Hope Declan | 8 |
| TV Show | 2009 | The Good Wife | Cindy Lewis | 1 |
| TV Show | 2015 | Rosewood | Naomi Bauer | 1 |
| TV Show | 1996 | Titanic | Ophelia Jack | 2 |
| TV Show | 2013 | Eve of Destruction | Calla | 2 |
| TV Show | 2018 | Little Dog | Ginny Ross | 15 |
| TV Show | 2018 | Eli Roth's History of Horror | Self | 1 |
| TV Show | 2024 | Tracker | Mallory Banks | 1 |
| TV Show | 1998 | First Wave | Elizabeth | 1 |
| TV Show | 2020 | Transplant | Marissa | 1 |
| TV Show | 2018 | Carter | Willow Harlow | 1 |
| TV Show | 2019 | The Order | Vera Stone | 20 |
| TV Show | 2024 | Sight Unseen | Gina Matheson | 1 |
