| Year | Title | Role | Notes |
| 1992 | Move the Crowd | | Television film |
| The Golden Palace | Dr. Fong | Episode: "One Old Lady to Go" |
| 1993 | Red Shoe Diaries | Phone Sex Worker | Episode: "Hotline" |
| 1994 | The Critic | | Voice, episode: "The Pilot" |
| Attack of the 5 Ft. 2 Women | Connie Tong | Television film |
| 1994–95 | All-American Girl | Margaret Kim | 19 episodes |
| 1995 | Duckman | Mai Lin | Voice, episode: "In the Nam of the Father" |
| Bill Nye the Science Guy | Self | Episode: "Populations" |
| 1995–97 | Happily Ever After: Fairy Tales for Every Child | Queen, Hul Muh Ni | Voice, 2 episodes |
| 1998 | Five Houses | | Television film |
| The Nanny | Caryn | Episode: "Mom's the Word" |
| 1999 | Dr. Katz, Professional Therapist | Margaret | Voice, episode: "Wisdom Teeth" |
| 2001 | Sex and the City | Lynne | Episode: "The Real Me" |
| 2002 | One on One | Coach | Episode: "Me & My Shadow" |
| 2003 | The Anna Nicole Show | Herself | Episode: "Holiday Special" |
| 2006 | The Lost Room | Suzie Kang | 2 episodes |
| 2007 | 'Til Death | Nicole | 3 episodes |
| 2007–09 | Rick & Steve: The Happiest Gay Couple in All the World | Condie Ling / Various | Voice, 9 episodes |
| 2008 | Two Sisters | | Television film |
| Sordid Lives: The Series | Therapist No. 17 | Episode: "The Day Tammy Wynette Died – Part 1" |
| The Cho Show | Herself | Writer, Producer and Executive Producer |
| Kathy Griffin: My Life on the D-List | Herself | Episode: "Fly the Super Gay Skies" |
| 2009–14 | Drop Dead Diva | Teri Lee | Main role, 72 episodes |
| 2010 | Ghost Whisperer | Prof. Avery Grant | 3 episodes |
| The A-List: New York | Herself | Episode: "Texting and Tears" |
| 2011–12 | 30 Rock | Kim Jong Il | 3 episodesNominated – Primetime Emmy Award for Outstanding Guest Actress in a Comedy Series |
| 2012-14 | Sullivan & Son | Jenny | |
| 2013 | Where the Bears Are | Mistress Lena | Episode: "Bears in Chains" |
| Pound Puppies | Mrs. Wattana | Episode: "Rebound's First Symphony" |
| 2014 | Cabot College | Laura | Television film |
| Hell's Kitchen | Herself – Restaurant Patron | Season 13 Episode 16: "Winner Chosen" |
| 2015 | Beat Bobby Flay | Herself | Season 6 Episode 12: "Rules Are Ment to Be Broken" |
| Celebrity Wife Swap | Herself | Episode: "Margaret Cho/Holly Robinson Peete" |
| All About Sex | Co-host | 2 episodes |
| Dr. Ken | Dr. Wendi | Episode: "Dr. Wendi: Coming To L.A.!" |
| 2016 | Family Guy | Sujin | Voice, episode: "Candy, Quahog Marshmallow" |
| TripTank | Ling, Dump | Voice, episode: "Deuce Ex Machina" |
| 2013–2017 | Fashion Police | Co-host | 21 episodes |
| 2017 | The Mr. Peabody & Sherman Show | Hua Mulan | Voice, episode: "Mulan" |
| 2018 | Home: Adventures with Tip & Oh | Georgia | Voice, episode: "Trashbassador" |
| 2019 | The Masked Singer | Poodle/Herself | |
| High Maintenance | Doc Lee | Episode: "Pay Day" |
| Law & Order: SVU | Evelyn Lee | Episode: "Counselor, it's Chinatown" |
| Miracle Workers | God's Mom | Episode: "1 Day" |
| 2020 | The Bachelorette | Herself | Episode: "Week 3" |
| Mike Tyson Mysteries | Michelle | Voice, episode: "Your Old Man" |
| The Bold Type | Herself | Episode: "#Scarlet" |
| 2021–2022 | Tuca & Bertie | Bertie's mother | Voice, 2 episodes |
| 2021 | Infinity Train | Morgan | Voice, 3 episodes |
