| Year | Title | Role | Notes |
| 1981–1982 | The Doctors | Erich Aldrich | 2 episodes |
| 1987 | Guiding Light | Cameron Stewart | Contract role |
| 1988 | ABC Afterschool Specials | Randy Forrester | Episode: "Terrible Things My Mother Told Me" |
| 1990 | CBS Schoolbreak Special | Donnie | Episode: "Flour Babies" |
| Married... with Children | The Kid | Episode: "The Unnatural" |
| 1990–2000 | Beverly Hills, 90210 | Steve Sanders, Ronnie Robertson | Main roleProducerDirector: "I'm Using You 'Cause I Like You"Writer: "Sentenced to Life" (story by) |
| 1992 | Melrose Place | Steve Sanders | 3 episodes |
| Parker Lewis Can't Lose | Himself | Episode: "Geek Tragedy" |
| 1993–1996 | Biker Mice from Mars | Vinnie | Voice, main role |
| 1994 | Aaahh!!! Real Monsters | Gludge | Voice, episode: "Smile and Say Oblina" |
| Beverly Hills, 90210: A Christmas Special | Himself | Television film |
| 1995 | The Women of Spring Break | George Peck |
| 1996 | Subliminal Seduction | Darrin Danver |
| 1996–1997 | Mighty Ducks | Wildwing Flashblade | Voice, main role |
| 1998 | V.I.P. | Peter, Tasha's ex-husband | Episode: "Bloody Val-entine" |
| All-Star Party for Aaron Spelling | Himself | Television special |
| 78th Annual Miss America Pageant | Himself (Judge) |
| 1998–1999 | Hollywood Squares | Himself (Panelist) | Recurring role |
| 1998–2001 | Godzilla: The Series | Dr. Niko Tatopoulos | Voice |
| 1999 | Love Boat: The Next Wave | Joshua Krumb | Episode: "Don't Judge a Book by Its Lover" |
| Batman Beyond | Mason Forrest | Voice, episode: "The Winning Edge" |
| 2000 | Twice in a Lifetime | Dr. Steven Weaver/Lance Kensington | Episode: "Even Steven" |
| 2001 | Inside Schwartz | Parker | Episode: "Event Night"; uncredited |
| JAG | Captain William Shepard | Episode: "Ambush" |
| The Test | Himself (Panelist) | Episode: "The PDA Test" |
| 2002 | Son of the Beach | Harry Johnson | 3 episodes |
| What I Like About You | Paul Cody | Episode: "Copy That" |
| 2003 | Spider-Man: The New Animated Series | Harry Osborn | Voice |
| 2006–2007 | Biker Mice from Mars | Vinnie |
| 2007 | Side Order of Life | Brian Fowler | 3 episodes |
| Drawn Together | Chase Huffington | Voice, episode: "Drawn Together Babies" |
| Dancing with the Stars | Himself (Contestant) | |
| 2008 | Your Mama Don't Dance | Himself (Host) | |
| Lava Storm | John Wilson | Television film |
| 2009 | The Christmas Hope | Nathan Andrews |
| 2010 | CSI: NY | Thom Weir | Episode: "Pot of Gold" |
| Elopement | David Drummond | Television film |
| 2011 | Happily Divorced | Robert, Support Group Leader | Episode: "Spousal Support" |
| 2013 | Sharknado | Fin Shepard | Television film |
| Deadtime Stories | Mr. Tyler | Episode: "Terror in Tiny Town" |
| Hell's Kitchen | Himself (Restaurant Patron) | Episode: "9 Chefs Compete" |
| Shark After Dark | Himself (Guest) | Episode: "Sharkmania!" |
| Oprah: Where Are They Now? | Episode: "90210 Star Ian Ziering" |
| 2014 | Sharknado 2: The Second One | Fin Shepard | Television film |
| Sproutnado: Synchronized Swimming | Himself – Swimmer |
| Sproutnado: So Many Numbers in the Ocean |
| Sproutnado: Shark Costume Delivery | Himself – Movie Star |
| Sproutnado: Ocean Weather Report | Weather Reporter |
| 94th Annual Miss America Pageant | Himself (Judge) | Television special |
