| Year | Title | Role | Notes | Ref(s) |
|---|
| 1994 | Incredible Games | The Lift (voice) | 14 episodes |
| Games World | Lesley, Professor, Mike, Barry | 2 episodes | |
| 1996 | Mash and Peas | Gareth Peas | 9 episodes | |
| Asylum | Cockney film star | 1 episode | |
| 1997 | It's Ulrika! | Various roles | TV film | |
| 1998 | Alexei Sayle's Merry-Go-Round | Newsagent | 1 episode | |
| Barking | Various roles | 6 episodes | |
| You Are Here | Murray Moffatt | Television film | |
| 1999 | Bang, Bang, It's Reeves and Mortimer | Various roles | 5 episodes | |
| Sir Bernard's Stately Homes | Anthony Rodgers | 6 episodes |
| Coming Soon | Graeme Cunliffe | Television film | |
| Spaced | Vulva | | |
| The Web of Caves | Chief alien | Television short | |
| The Pitch of Fear | Sydney Newman | Television short | |
| The Kidnappers | David | Television short | |
| 1999–2022 | Rock Profile | Various roles | | |
| 2000 | Full Mountie | Tony Rodgers | 1 episode | |
| The Strangerers | Rats | 5 episodes | |
| Attachments | Jake Plaskow | 1 episode | |
| Black Books | Customer | 1 episode | |
| 2001 | Fun at the Funeral Parlour | Cobra | 1 episode | |
| Baddiel's Syndrome | James Bourne | 2 episodes | |
| High Stakes | Stephen Clay | 1 episode | |
| World of Pub | Dr. Seuss | 1 episode | |
| Randall and Hopkirk (Deceased) | Browning | 1 episode | |
| 2002 | Ted and Alice | Shane | 3 episodes | |
| Time Gentlemen Please | Marcel | 1 episode | |
| Nice Guy Eddie | Harry Lloyd | 1 episode | |
| The Bill | Ben Fletcher | 1 episode | |
| George Eliot: A Scandalous Life | John Chapman | Television film | |
| Cruise of the Gods | Jeff 'Lurky' Monks | Television film | |
| Sport Relief | Co-host | One-off special | |
| 2002–2005 | Look Around You | Bournemouth / Man with 'The Bum' | 2 episodes | |
| 2003 | Casualty | Jon Fielding | 1 episode | |
| EastEnders | Ray | 2 episodes | |
| 2003–2006 | Little Britain | Various roles | 36 episodes | |
| 2004 | Hustle | Dress shop manager | 1 episode | |
| Monkey Trousers | Various roles | Television film | |
| French and Saunders | Various roles | 1 episode | |
| Agatha Christie's Marple | George Bartlett | 1 episode | |
| Samantha oups! | Actor | 1 episode | |
| 2005 | Waking the Dead | Bell | 2 episodes | |
| 2007 | Hotel Babylon | Adrian Tintagel | 1 episode | |
| Neighbours | Lou Todd | 1 episode | |
| Capturing Mary | Greville White | Television film | |
| 2008 | Frankie Howerd: Rather You Than Me | Frankie Howerd | Television film | |
| Little Britain USA | Various roles | 6 episodes | |
| 2009–2011 | Never Mind the Buzzcocks | Presenter | 2 episodes | |
| 2010 | The One Ronnie | Various roles | One-off special | |
| 2010–2011 | Come Fly with Me | Various roles | 6 episodes | |
| 2011 | David Walliams' Awfully Good | Presenter | 3 episodes | |
| Wall of Fame | Host | 5 episodes | |
| Doctor Who | Gibbis | 1 episode | |
| 2012 | The Royal Bodyguard | Sir Ambrose Hamilton | 1 episode | |
| The Greatest Footie Ads Ever | Lou | Television film | |
| Top Dog Model | Narrator | 6 episodes | |
| Are You Having a Laugh? TV and Disability | Narrator | Television film | |
| David Walliams: The Genius of Dahl | Presenter | One-off special | |
| Mr Stink | Steve the British Prime Minister | Television film | |
| Room on the Broom | Frog (voice) | Television short | |
| 2012, 2016 | Royal Variety Performance | Compère | One-off special | |
| 2012–2022 | Britain's Got Talent | Himself, Judge | Series 6-15 | |
| 2013 | Blandings | Rupert Baxter | 2 episodes | |
| Gangsta Granny | Mike | Television film | |
| 2013–2014 | Big School | Mr. Keith Church | 12 episodes | |
| 2013–present | Comic Relief | Co-host | One-off special | |
| 2014 | The Boy in the Dress | Referee | Television film | |
| 2015 | Partners in Crime | Tommy Beresford | 6 episodes | [1] |
| The Nation's Favourite Bond Song | Narrator | One-off special | |
| 2015–2016 | Walliams & Friend | Himself | 7 episodes | |
| 2016 | Some Mothers Do 'Ave 'Em | Himself | 1 episode | |
| Royal Variety Performance | Presenter | One-off special | |
| Billionaire Boy | Mrs. Trafe | Television film | |
| Blankety Blank | Presenter | 1 episode | |
| Revolting Rhymes | Various roles | Television film | [2] |
| David Walliams Celebrates Dame Shirley Bassey | Presenter | One-off special | |
| 2017 | Jack Whitehall at Large: Intro | Himself | Television short | |
| The Nightly Show | Presenter | 5 episodes | |
| Ratburger | Burt | Television film | |
| 2017–2018 | Teletubbies | Voice Trumpet | Voice role | |
| 2018 | Elton John: The Nation's Favourite Song | Presenter | One-off special | |
| Grandpa's Great Escape | Barry | Television film | |
| The Queen and I | Jack Barker | Television film | |
| The Midnight Gang | Headmaster | Television film | |
| It'll Be Alright on the Night | Narrator | One-off special | |
| 2019 | Urban Myths | Monty | 1 episode | |
| An Evening with Elton John | Himself | One-off special | |
| Britain's Got Talent: The Champions | Himself, Judge | 6 episodes | |
| Not the Robbie Williams Christmas Show | Gillian Smith | One-off special | |
| Cinderella: After Ever After | Prince Charming | Christmas special | |
| 2020–2021 | Sandylands | Derek Swallows | 6 episodes | |
| 2020 | 25th National Television Awards | Presenter | One-off special | |
| The Big Night In | Himself, various roles | One-off special | |
| 2021 | Chitty Flies Again with David Walliams | Himself | Television film | |
| Saturday Knight Takeaway | Himself | Television film | |
| Jack and the Beanstalk: After Ever After | The Giant | Christmas special | |
| Hansel & Gretel: After Ever After | Troll | Television film | |
| Quentin Blake: The Drawing of My Life | Himself | Television film | |
| 2022 | Australia's Got Talent | Himself, Judge | Season 10 | |
| Gangsta Granny Strikes Again! | Mike | Television film | [3] |
| Red Riding Hood: After Ever After | Wolf | Television film | |
