| Movie | 2021 | Bill Bailey: Larks in Transit | Self | |
| Movie | 2000 | Saving Grace | Vince | |
| Movie | 2005 | The Hitchhiker's Guide to the Galaxy | The Whale (voice) | |
| Movie | 2008 | Bill Bailey: Tinselworm | Himself | |
| Movie | 2004 | Bill Bailey: Part Troll | Himself | |
| Movie | 2010 | Nanny McPhee and the Big Bang | Farmer MacReadie | |
| Movie | 2009 | Bill Bailey's Remarkable Guide to the Orchestra | Himself | |
| Movie | 2001 | Bill Bailey: Bewilderness | Himself | |
| Movie | 1997 | Bill Bailey: Cosmic Jam | Himself | |
| Movie | 1997 | April Fool's Day | Sand Delivery Man | |
| Movie | 2016 | Nature's Perfect Partners | Narrator | |
| Movie | 2014 | Nature's Misfits | Narrator | |
| Movie | 2021 | Worzel Gummidge: Calliope Jane | Mr Peregrine | |
| Movie | 2010 | Burke & Hare | Angus | |
| Movie | 2010 | Bill Bailey: Dandelion Mind | Himself | |
| Movie | 2011 | Chalet Girl | Bill Matthews | |
| Movie | 2004 | Spaced: Skip to the End | Self | |
| Movie | 2013 | Bill Bailey: Qualmpeddler | Self | |
| Movie | 2021 | Christmas Comedy Club with Lost Voice Guy | Self | |
| Movie | 2022 | The Fringe, Fame and Me | Self | |
| Movie | 2014 | 50 Years of BBC Two Comedy | Self | |
| Movie | 2005 | Comic Aid | | |
| Movie | 2008 | We Are Most Amused | Self | |
| Movie | 2023 | The Smeds and the Smoos | Grandfather Smed (voice) | |
| Movie | 2011 | Making Qi | Self | |
| Movie | 2015 | Michael McIntyre's Easter Night at the Coliseum | Self | |
| Movie | 2012 | Evidently... John Cooper Clarke | Himself | |
| Movie | 2011 | Pythagasaurus | Ig | |
| Movie | 2018 | Bill Bailey: Limboland | Self | |
| Movie | 2018 | We Are Most Amused and Amazed | Self | |
| Movie | 2011 | Doctor Who: The Doctor, the Widow and the Wardrobe | Droxil | |
| Movie | 2007 | Hot Fuzz | Sergeant Turner | |
| Movie | 2020 | Roald & Beatrix: The Tail of the Curious Mouse | Bona Fide Gent | |
| Movie | 2008 | Blackadder's Most Cunning Moments | Self | |
| Movie | 2024 | Man and Witch: The Dance of a Thousand Steps | The Donkey (voice) | |
| Movie | 2014 | The Comedy Vaults: BBC2's Hidden Treasure | Self | |
| Movie | 2005 | Don't Crash: The Documentary of the Making of the Movie of the Book of the Radio Series of 'The Hitchhiker's Guide to the Galaxy' | Self (uncredited) | |
| Movie | 2024 | How To Make It In Comedy | | |
| Movie | 2014 | Big Butts Like It Big: Brunette Edition | | |
| Movie | 2008 | Blackadder Exclusive: The Whole Rotten Saga | Self | |
| Movie | 2017 | Sloppy Massage Sluts 2: Anal Edition | | |
| Movie | 2026 | Bill Bailey: Thoughtifier | Self | |
| TV Show | 2002 | Top Gear | Self | 2 |
| TV Show | 1999 | Spaced | Bilbo Bagshot | 3 |
| TV Show | 2006 | TV Heaven, Telly Hell | | 1 |
| TV Show | 2007 | Skins | Walter | 2 |
| TV Show | 2006 | The One Show | Self - Guest | 2 |
| TV Show | 2002 | Fifth Gear | Self | 1 |
| TV Show | 2005 | Spicks and Specks | | 1 |
| TV Show | 1996 | Never Mind the Buzzcocks | Self | 102 |
| TV Show | 1997 | Jonathan Creek | Kennie Starkiss | 1 |
| TV Show | 1998 | Is It Bill Bailey? | Self / Various Roles | 6 |
| TV Show | 2003 | QI | Self | 48 |
| TV Show | 2001 | Richard & Judy | Self | 1 |
| TV Show | 2002 | Ant & Dec's Saturday Night Takeaway | Dr. Russ | 1 |
| TV Show | 2021 | This Is My House | Self | 6 |
| TV Show | 2002 | Wild West | Doug | 8 |
| TV Show | 1993 | Late Night with Conan O'Brien | Self - Comedy Guest | 1 |
| TV Show | 2021 | Patriot Brains | Host | 10 |
| TV Show | 2006 | Robins | Self - Guest | 1 |
| TV Show | 1997 | Space Cadets | Space Captain | 10 |
| TV Show | 2013 | 8 Out of 10 Cats Does Countdown | Self - Dictionary Corner | 2 |
| TV Show | 2005 | The Late Late Show with Craig Ferguson | Self | 1 |
| TV Show | 2009 | Talkin' 'Bout Your Generation | | 1 |
| TV Show | 2007 | More Dawn French's Boys Who Do: Comedy | | 1 |
| TV Show | 2006 | Wild Thing: I Love You | Presenter | 10 |
| TV Show | 1993 | GMTV | Self | 1 |
| TV Show | 2009 | Live from Studio Five | Self | 1 |
| TV Show | 2000 | Head on Comedy | | 6 |
| TV Show | 2000 | Black Books | Manny | 18 |
| TV Show | 1983 | Natural World | Narrator | 2 |
| TV Show | 1996 | Asylum | Patient | 1 |
| TV Show | 2019 | My Life Is Murder | Enzo Pavone | 1 |
| TV Show | 2004 | Hustle | Cyclops | 3 |
| TV Show | 2013 | What a Load of Buzzcocks | Self - Team Captain | 8 |
| TV Show | 2015 | Funny Valentines | William/Craig/Bill | 1 |
| TV Show | 2022 | Bill Bailey's Master Crafters | Self - Presenter | 8 |
| TV Show | 1992 | Blue Heaven | Boris | 1 |
| TV Show | 2006 | The One Show | Self | 1 |
| TV Show | 2022 | The John Bishop Show | Self | 1 |
| TV Show | 2007 | The Graham Norton Show | Self | 11 |
| TV Show | 2014 | Alan Davies: As Yet Untitled | Self | 3 |
| TV Show | 2021 | Rhod Gilbert's Growing Pains | Guest | 1 |
| TV Show | 2021 | The Cheap Seats | Self | 1 |
| TV Show | 2023 | Bill Bailey's Australian Adventure | Self - Presenter | 4 |
| TV Show | 2016 | The Grand Tour | Self | 1 |
| TV Show | 2019 | Hypothetical | Self | 1 |
| TV Show | 2013 | 8 Out of 10 Cats Does Countdown | Self | 8 |
| TV Show | 2018 | In the Long Run | Bagpipes | 19 |
| TV Show | 2012 | Gadget Man | | 1 |
| TV Show | 1994 | Room 101 | Self | 2 |
| TV Show | 2013 | Julia Zemiro's Home Delivery | Self | 1 |
| TV Show | 2019 | Celebrity Gogglebox | Self | 1 |
| TV Show | 2016 | Michael McIntyre's Big Show | Self - Performer | 1 |
| TV Show | N/A | Have I Got a Bit More News for You | Self - Presenter | 7 |
| TV Show | 2017 | LEGO Masters | Guest Judge | 1 |
| TV Show | 2010 | Bill Bailey's Birdwatching Bonanza | Presenter | 6 |
| TV Show | 2011 | Baboons with Bill Bailey | Himself - Presenter | 8 |
| TV Show | 2013 | Bill Bailey's Jungle Hero | Himself - Presenter | 2 |
| TV Show | 1996 | Good News Week | Self | 1 |
| TV Show | 2017 | Walks with My Dog | Self | 4 |
| TV Show | 2024 | Perfect Pub Walks | Himself | 4 |
| TV Show | 2024 | Bring the Drama | Self - Presenter | 6 |
| TV Show | 2020 | Michael McIntyre's The Wheel | Self - Expert | 3 |
| TV Show | 1990 | Have I Got News for You | Self - Host | 7 |
| TV Show | 2005 | Final Chance to Save | Himself | 1 |
| TV Show | 1997 | Midsomer Murders | Darwin Chipping | 1 |
| TV Show | 2014 | Monty Python's Best Bits (Mostly) | Self | 1 |
| TV Show | 2020 | Between the Covers | Self | 1 |
| TV Show | 2022 | Take 5 with Zan Rowe | Self - Guest | 1 |
| TV Show | 2002 | 15 Storeys High | Mr. Pirbright | 1 |
| TV Show | 2022 | Best & Bester | Grumpy Pants (Voice) | 52 |
| TV Show | 2020 | McDonald & Dodds | Paul Watt - Radio DJ (voice) | 1 |
| TV Show | 1990 | Have I Got News for You | Self | 3 |
| TV Show | 2013 | The Last Leg | Self | 3 |
| TV Show | 1988 | This Morning | Self | 1 |
| TV Show | 2022 | Extraordinary Portraits | Self - Presenter / Narrator | 18 |
| TV Show | 2013 | It's Kevin | Various | 1 |
| TV Show | 2003 | QI | Self - Panellist (archive footage) | 2 |
| TV Show | 2014 | Alan Davies Après-Ski | | 1 |
| TV Show | 2025 | Bill Bailey’s Vietnam | Self - Host | 6 |
| TV Show | 2018 | Celebrity Catchphrase | Self - Contestant | 1 |
