| Movie | 1935 | Bride of Frankenstein | The Monster | |
| Movie | 1932 | Scarface | Gaffney | |
| Movie | 1953 | Abbott and Costello Meet Dr. Jekyll and Mr. Hyde | Dr. Henry Jekyll / Mr. Hyde | |
| Movie | 1931 | Frankenstein | The Monster | |
| Movie | 1939 | Son of Frankenstein | The Monster | |
| Movie | 1944 | House of Frankenstein | Dr. Gustav Niemann | |
| Movie | 1958 | Frankenstein 1970 | Baron Viktor von Frankenstein | |
| Movie | 1932 | The Mask of Fu Manchu | Dr. Fu Manchu | |
| Movie | 1968 | The Movie Orgy | Self (archive footage) | |
| Movie | 1941 | Information Please: Series 2, No. 12 | Self | |
| Movie | 1947 | Lured | Charles van Druten | |
| Movie | 1941 | The Devil Commands | Dr. Julian Blair | |
| Movie | 1939 | Devil's Island | Dr. Charles Gaudet | |
| Movie | 1942 | The Boogie Man Will Get You | Prof. Nathaniel Billings | |
| Movie | 1952 | The Black Castle | Dr. Meissen | |
| Movie | 1945 | The Body Snatcher | John Gray | |
| Movie | 1945 | Isle of the Dead | Gen. Nikolas Pherides | |
| Movie | 1936 | The Man Who Changed His Mind | Dr. Laurence | |
| Movie | 1958 | Corridors of Blood | Dr. Thomas Bolton | |
| Movie | 1936 | Juggernaut | Dr. Victor Sartorius | |
| Movie | 1948 | Tap Roots | Tishomingo | |
| Movie | 1940 | Doomed to Die | James Lee Wong | |
| Movie | 2008 | He Who Made Monsters: The Life and Art of Jack Pierce | Self (archive footage) | |
| Movie | 1938 | Mr. Wong, Detective | James Lee Wong | |
| Movie | 1946 | Bedlam | George Sims | |
| Movie | 1934 | The Black Cat | Hjalmar Poelzig | |
| Movie | 1932 | The Old Dark House | Morgan | |
| Movie | 1963 | The Terror | Baron Victor Frederick Von Leppe | |
| Movie | 1924 | The White Panther | Shere Ali's Aide (as Karloff Boris) | |
| Movie | 1924 | The Hellion | The Outlaw | |
| Movie | 1919 | The Lightning Raider | | |
| Movie | 1924 | Riders of the Plains | | |
| Movie | 1919 | The Prince and Betty | Undetermined Role | |
| Movie | 1925 | Forbidden Cargo | Pietro Castillano | |
| Movie | 1925 | Perils of the Wild | | |
| Movie | 1925 | Lady Robinhood | Cabraza | |
| Movie | 1920 | The Courage of Marge O'Doone | Tavish | |
| Movie | 1925 | Never the Twain Shall Meet | | |
| Movie | 1925 | Without Mercy | Madame Gordon's 2nd Henchman (uncredited) | |
| Movie | 1921 | Cheated Hearts | Nei Hamid | |
| Movie | 1926 | The Golden Web | Dave Sinclair | |
| Movie | 1926 | Flames | Blackie Blanchette | |
| Movie | 1926 | Flaming Fury | Gaspard | |
| Movie | 1927 | Let It Rain | Crook | |
| Movie | 1927 | The Princess from Hoboken | Pavel | |
| Movie | 1927 | The Meddlin' Stranger | Al Meggs | |
| Movie | 1927 | Soft Cushions | The Chief Conspirator | |
| Movie | 1928 | The Vanishing Rider | The Villain | |
| Movie | 1928 | Sharp Shooters | Cafe Proprietor (uncredited) | |
| Movie | 1928 | Vultures of the Sea | Grouchy | |
| Movie | 1940 | The Man with Nine Lives | Dr. Leon Kravaal | |
| Movie | 1929 | Burning the Wind | Pug Doran | |
| Movie | 1940 | Before I Hang | Dr. John Garth | |
| Movie | 1939 | The Man They Could Not Hang | Dr. Henryk Savaard | |
| Movie | 1928 | The Little Wild Girl | Maurice Kent | |
| Movie | 1935 | The Black Room | Baron Gregor de Berghman / Anton de Berghman | |
| Movie | 1929 | The Devil's Chaplain | Boris | |
| Movie | 1929 | Two Sisters | Cecil | |
| Movie | 1929 | The Fatal Warning | Mullins | |
| Movie | 1930 | The Bad One | Monsieur Gaston | |
| Movie | 1929 | The Unholy Night | Abdul Mohammed Bey - the Hindu Lawyer (uncredited) | |
| Movie | 1932 | Business and Pleasure | Sheik Ali-Ben Joseph | |
| Movie | 1929 | Anne Against the World | | |
| Movie | 1949 | The Emperor's Nightingale | Narrator (English version) | |
| Movie | 1936 | The Walking Dead | John Ellman | |
| Movie | 1949 | Bud Abbott and Lou Costello Meet the Killer, Boris Karloff | Swami Talpur | |
| Movie | 2004 | Monster Movie Trivia Quiz | | |
| Movie | 1966 | How the Grinch Stole Christmas! | Narrator / The Grinch (voice) | |
| Movie | 1922 | Nan of the North | Undetermined Role (uncredited) | |
| Movie | 1922 | The Man from Downing Street | Maharajah Jehan | |
| Movie | 1922 | The Infidel | The Nabob | |
| Movie | 1922 | Omar the Tentmaker | Imam Mowaffak | |
| Movie | 1922 | The Woman Conquers | Raoul Maris | |
| Movie | 1922 | The Altar Stairs | Hugo | |
| Movie | 1923 | The Prisoner | Prince Kapolski | |
| Movie | 1979 | The Horror Show | (archive footage) | |
| Movie | 1936 | The Invisible Ray | Dr. Janos Rukh | |
| Movie | 1963 | Black Sabbath | Gorca (segment "The Wurdalak") | |
| Movie | 1933 | The Ghoul | Prof. Morlant | |
| Movie | 1931 | King of the Wild | Mustapha | |
| Movie | 1937 | Night Key | David Mallory | |
| Movie | 1936 | Charlie Chan at the Opera | Gravelle | |
| Movie | 1968 | Curse of the Crimson Altar | Professor John Marsh | |
| Movie | 1947 | The Secret Life of Walter Mitty | Dr. Hugo Hollingshead | |
| Movie | 1932 | Behind the Mask | Jim Henderson | |
| Movie | 1939 | Tower of London | Mord | |
| Movie | 2001 | Heroes of Horror | (archive footage) | |
| Movie | 1940 | Black Friday | Dr. Ernest Sovac | |
| Movie | 1963 | The Raven | Dr. Scarabus | |
| Movie | 1974 | Madhouse | (archive footage) | |
| Movie | 1965 | Die, Monster, Die! | Nahum Witley | |
| Movie | 1964 | The Comedy of Terrors | Amos Hinchley | |
| Movie | 1971 | Alien Terror | Prof. John Mayer | |
| Movie | 1931 | Five Star Final | T. Vernon Isopod | |
| Movie | 1931 | The Criminal Code | Ned Galloway | |
| Movie | 1940 | The Ape | Dr. Bernard Adrian | |
| Movie | 1932 | The Mummy | Imhotep, alias Ardath Bey | |
| Movie | 1940 | The Mummy's Hand | Kharis (archive footage / uncredited) | |
| Movie | 1974 | The Horror Hall of Fame: A Monster Salute | Self (archive footage) | |
| Movie | 1957 | Voodoo Island | Phillip Knight | |
| Movie | 1944 | The Mummy's Curse | Kharis in Flashback (archive footage / uncredited) | |
| Movie | 1954 | The Island Monster | Don Gaetano | |
| Movie | 1935 | The Raven | Edmond Bateman | |
| Movie | 1929 | Behind That Curtain | Beetham's Manservent | |
| Movie | 1934 | The Lost Patrol | Sanders | |
| Movie | 1967 | Mad Monster Party? | Baron Boris von Frankenstein (voice) | |
| Movie | 1944 | The Climax | Dr. Friedrich Hohner | |
| Movie | 1951 | The Strange Door | Voltan | |
| Movie | 1931 | Smart Money | Sport Williams | |
| Movie | 1968 | Fear Chamber | Dr. Carl Mandel | |
| Movie | 1968 | Macabre Serenade | Matthias Morteval | |
| Movie | 1971 | Isle of the Snake People | Carl van Molder / Damballah | |
| Movie | 1968 | Targets | Byron Orlok | |
| Movie | 1940 | You'll Find Out | Judge Spencer Mainwaring | |
| Movie | 1939 | British Intelligence | Valdar | |
| Movie | 1947 | Dick Tracy Meets Gruesome | Gruesome | |
| Movie | 1947 | Unconquered | Guyasuta, Chief of the Senecas | |
| Movie | 2021 | Boris Karloff: The Man Behind the Monster | Self (archive footage) | |
| Movie | 1967 | The Sorcerers | Prof. Marcus Monserrat | |
| Movie | 1987 | Creepy Classics | Dr. Scarabus - (archive footage) | |
| Movie | 1957 | The Lark | Bishop Cauchon | |
| Movie | 2000 | The American Nightmare | Self | |
| Movie | 1934 | The House of Rothschild | Count Ledrantz | |
| Movie | 1958 | Grip of the Strangler | James Rankin | |
| Movie | 1939 | Mr. Wong in Chinatown | Mr. James Lee Wong | |
| Movie | 1939 | The Mystery of Mr. Wong | James Lee Wong | |
| Movie | 1940 | The Fatal Hour | James Lee Wong | |
| Movie | 1966 | The Ghost in the Invisible Bikini | The Corpse | |
| Movie | 1970 | Cauldron of Blood | Franz Badulescu | |
| Movie | 1967 | The Venetian Affair | Dr. Pierre Vaugiroud | |
| Movie | 1931 | Tonight or Never | Waiter | |
| Movie | 1955 | Sting of Death | Mr. Mycroft | |
| Movie | 1927 | Tarzan and the Golden Lion | Owaza | |
| Movie | 1964 | A Fool's World | Narrator | |
| Movie | 1937 | Cinema Circus | Himself | |
| Movie | 1931 | The Mad Genius | Fedor's Father (uncredited) | |
| Movie | 1931 | The Vanishing Legion | The Voice (voice) | |
| Movie | 1991 | Dracula: A Cinematic Scrapbook | Doctor Gustav Niemann (archive footage) | |
| Movie | 2000 | The Many Faces of Dracula | The Monster (archive footage) | |
| Movie | 1991 | Frankenstein: A Cinematic Scrapbook | The Monster / Gustav Niemann / Dr. Jekyll / Mr. Hyde / etc. | |
| Movie | 1934 | Gift of Gab | Himself | |
| Movie | 1931 | The Public Defender | The Professor | |
| Movie | 1931 | Graft | Terry | |
| Movie | 1926 | The Nickel-Hopper | Dance Hall Masher | |
| Movie | 1926 | The Bells | The Mesmerist | |
| Movie | 1982 | Oops, Those Hollywood Bloopers! | Self (archive footage) | |
| Movie | 1930 | The Sea Bat | Corsican | |
| Movie | 1938 | The Invisible Menace | Jevries | |
| Movie | 1937 | West of Shanghai | "General" Wu Yen Fang | |
| Movie | 1931 | The Guilty Generation | Tony Ricca | |
| Movie | 2013 | A Masque of Madness (Notes on Film 06-B, Monologue 02) | Self (archive footage) | |
| Movie | 1924 | Dynamite Dan | Tony Garcia | |
| Movie | 2014 | Monster Madness: The Golden Age of the Horror Film | Various roles (archive footage) | |
| Movie | 1929 | The King of the Kongo | Scarface Macklin | |
| Movie | 1966 | The Daydreamer | The Rat (voice) | |
| Movie | 1931 | Cracked Nuts | Boris - First Revolutionary | |
| Movie | 1932 | Night World | 'Happy' MacDonald | |
| Movie | 2006 | Lugosi: The Dark Prince | Self (archive footage) | |
| Movie | 1984 | Going Hollywood: The '30s | (archive footage) | |
| Movie | 1983 | The Horror of It All | Frankenstein / Cabman John Gray (archive footage) | |
| Movie | 1932 | The Miracle Man | Nikko | |
| Movie | 2013 | Classic Movie Bloopers: Uncensored | Self (archive footage) | |
| Movie | 1927 | Two Arabian Knights | Purser | |
| Movie | 1929 | The Phantom of the North | Jules Gregg | |
| Movie | 1930 | The Utah Kid | Henchman Baxter | |
| Movie | 1920 | The Last of the Mohicans | Indian (uncredited) | |
| Movie | 1990 | Abbott and Costello in the Movies | Archival | |
| Movie | 1926 | The Eagle of the Sea | Pirate (uncredited) | |
| Movie | 1927 | The Phantom Buster | Ramon | |
| Movie | 1957 | The Juggler of Our Lady | Narrator (voice) | |
| Movie | 2024 | The Last Repair Shop | The Monster (archive footage) (uncredited) | |
| Movie | 2022 | Boris Karloff: The Rest of the Story | Self - Interviewee | |
| Movie | 2007 | Bela Lugosi: The Fallen Vampire | Himself (archive footage) | |
| Movie | 1926 | Old Ironsides | Saracen Guard (uncredited) | |
| Movie | 1920 | The Deadlier Sex | Jules Borney | |
| Movie | 1931 | The Yellow Ticket | Drunken Orderly | |
| Movie | 1961 | Days of Thrills and Laughter | Self (archive footage) | |
| Movie | 2021 | Hollywood in the Atomic Age: Monsters! Martians! Mad Scientists! | Self (archive footage) | |
| Movie | 1953 | Colonel March Investigates | Colonel March | |
| Movie | 2004 | The 50 Worst Movies Ever Made | Dr. Bernard Adrian (archive footage) | |
| Movie | 1932 | Skyscraper Souls | Man Approaching Ticket Counter | |
| Movie | 1980 | Monsters on the March (and a Pair of Marvels!) | | |
| Movie | 1960 | The Fatal Impulse | Self | |
| Movie | 1931 | I Like Your Nerve | Luigi - Pacheco's Butler | |
| Movie | 1958 | Jack the Ripper | Host / Capt. John Elwood / Jonas Atterbury / Dr. Francis Mason | |
| Movie | 1958 | Destination Nightmare | Host / Ira Perry / Pete Wade Sr. / Professor Charles Goncourt / Morgan Debs | |
| Movie | 1989 | Transylvania Twist | Man in Room (archive footage) | |
| Movie | 1932 | Boo | Frankenstein's Monster (edited from "Frankenstein") | |
| Movie | 1962 | Little Lost Robot | Host | |
| Movie | 1955 | A Connecticut Yankee | King Arthur | |
| Movie | 1921 | The Cave Girl | Baptiste | |
| Movie | 2000 | Mummy Dearest: A Horror Tradition Unearthed | Self (archive footage) | |
| Movie | 2006 | Terror in the Tropics | Mr. Wong (archive footage) | |
| Movie | 1964 | Bikini Beach | Art Dealer | |
| Movie | 1919 | His Majesty, the American | Henchman in cloth cap | |
| Movie | 1937 | Breakdowns of 1937 | Self | |
| Movie | 1932 | The Cohens and Kellys in Hollywood | Boris Karloff | |
| Movie | 1975 | Brother, Can You Spare a Dime? | Self (archive footage) | |
| Movie | 2003 | The Mesmerist | (archive footage) | |
| Movie | 1942 | Hedda Hopper’s Hollywood No. 6 | Himself | |
| Movie | 2006 | Karloff: The Gentle Monster | Self (archive footage) | |
| Movie | 2002 | The 'Frankenstein' Files: How Hollywood Made a Monster | Self (archive footage) | |
| Movie | 1931 | Young Donovan's Kid | Cokey Joe | |
| Movie | 1990 | Myrna Loy: So Nice to Come Home To | (archive footage) | |
| Movie | 1927 | The Love Mart | Fleming | |
| Movie | 1996 | The Universal Story | Self (archive footage) | |
| Movie | 2007 | Ian Rankin Investigates: Dr. Jekyll & Mr. Hyde | Cabman John Gray (archive footage) | |
| Movie | 1921 | The Hope Diamond Mystery | Priest of Kama-Sita / Dakar | |
| Movie | 1955 | Sabaka | General Pollegar | |
| Movie | 1926 | The Greater Glory | Scissors Grinder | |
| Movie | 1964 | Today's Teens | Narrator | |
| Movie | 1962 | Arsenic & Old Lace | Jonathan Brewster | |
| Movie | 1925 | The Prairie Wife | Diego | |
| Movie | 1921 | Without Benefit of Clergy | Ahmed Khan | |
| Movie | 1926 | Her Honor, the Governor | Snipe Collins | |
| Movie | 2015 | Jack Pierce: The Man Who Made the Monsters | Self (archive footage) | |
| Movie | 1966 | Doom of Dracula | The Madman (archive footage) | |
| Movie | 1935 | Hollywood Hobbies | Himself | |
| Movie | 1934 | Screen Snapshots No. 11 | Himself | |
| Movie | 1925 | Parisian Nights | Pierre | |
| Movie | 1958 | Heart of Darkness | Mr. Kurtz | |
| Movie | 1926 | The Man in the Saddle | Robber (uncredited) | |
| Movie | 1962 | The Incredible Doktor Markesan | Dr. Konrad Markesan | |
| Movie | 1970 | Hatchet for the Honeymoon | Gorca (archive footage) | |
| Movie | 2012 | The Complete Bob Wilkins Creature Features | | |
| Movie | 1962 | The Storm | | |
| Movie | 2007 | Famous Monster: Forrest J Ackerman | Self (archive footage) | |
| Movie | 1999 | Monster by Moonlight! The Immortal Saga of 'The Wolf Man' | Self (archive footage) | |
| Movie | 1998 | Universal Horror | (archive footage) | |
| Movie | 1964 | Horror!!! | Self | |
| Movie | 1994 | How the Grinch Stole Christmas! Special Edition | (voice - archive footage) | |
| Movie | 1994 | Abbott and Costello Meet Jerry Seinfeld | Self (archive footage) | |
| Movie | 2023 | The Dark Universe | Frankenstein (archivo de imagen) | |
| Movie | 2023 | The Dark Universe | La Momia (archivo de imagen) | |
| Movie | 1956 | Rendezvous in Black | Ward Allen | |
| Movie | 1988 | Hollywood Scandals and Tragedies | | |
| TV Show | 1966 | The Girl from U.N.C.L.E. | | 1 |
| TV Show | 1960 | Route 66 | | 1 |
| TV Show | 1955 | This Is Your Life | Self | 1 |
| TV Show | 1962 | Out of This World | | 14 |
| TV Show | 1948 | Studio One | Skaggs | 1 |
| TV Show | 1953 | General Electric Theater | Mr. Blue Ocean | 1 |
| TV Show | 1951 | Hallmark Hall of Fame | Cauchon | 1 |
| TV Show | 1964 | Shindig! | Self - Guest Host / Singer | 1 |
| TV Show | 1960 | Thriller | Clayton Mace | 1 |
| TV Show | 1950 | Lux Video Theatre | Sir Arthur Strangeways | 1 |
| TV Show | 1951 | Schlitz Playhouse of Stars | Charles Brandon | 1 |
| TV Show | 1954 | Climax! | Dr. Philip Nestri | 1 |
| TV Show | 1956 | The Dinah Shore Chevy Show | Self | 2 |
| TV Show | 1958 | The Veil | | 10 |
| TV Show | 1951 | Down You Go | Self | 7 |
| TV Show | 1949 | Suspense | Toff | 1 |
| TV Show | 1950 | Robert Montgomery Presents | Bennett Kimball | 1 |
| TV Show | 1951 | Tales of Tomorrow | | 2 |
| TV Show | 1949 | Lights Out | | 1 |
| TV Show | 1956 | Colonel March of Scotland Yard | Colonel March Of Scotland Yard | 26 |
| TV Show | 1957 | DuPont Show of the Month | | 1 |
| TV Show | 1957 | Suspicion | Judge Winthrop Gelsey | 1 |
| TV Show | 1956 | Telephone Time | | 1 |
| TV Show | 1949 | Starring Boris Karloff | | 13 |
| TV Show | 1960 | Thriller | Self - Host | 67 |
| TV Show | 1954 | The George Gobel Show | Self | 1 |
| TV Show | 1950 | Lux Video Theatre | Montgomery Royle | 1 |
| TV Show | 1953 | General Electric Theater | Henry E. Church | 1 |
| TV Show | 1950 | Lux Video Theatre | Larkin | 1 |
| TV Show | 1950 | Robert Montgomery Presents | | 1 |
| TV Show | 1957 | The Lux Show | Self | 1 |
| TV Show | 1968 | The Name of the Game | Mikhail Orlov | 1 |
| TV Show | 1956 | The Rosemary Clooney Show | Self | 1 |
| TV Show | 1960 | Thriller | Pop Jenkins / Col. Jackson Beauregard Finchess | 1 |
| TV Show | 1960 | Thriller | Dr. Thorne | 1 |
| TV Show | 1960 | Thriller | Doktor Konrad Markesan | 1 |
| TV Show | 1960 | Thriller | Dr. Albert Farnham | 1 |
| TV Show | 1948 | Studio One | Professor Koernig | 1 |
| TV Show | 1948 | Studio One | King Arthur | 1 |
| TV Show | 1951 | Hallmark Hall of Fame | Jonathan Brewster | 1 |
| TV Show | 1954 | Climax! | Vicar Tellworth | 1 |
| TV Show | 1949 | Suspense | | 3 |
| TV Show | 1949 | Suspense | Bronson | 1 |
| TV Show | 1949 | Suspense | Rasputin | 1 |
| TV Show | 1951 | The Red Skelton Show | Professor Townsend (Spy) | 1 |
| TV Show | 1953 | The United States Steel Hour | George Redford | 1 |
| TV Show | 1950 | What's My Line? | Self | 1 |
| TV Show | 2005 | Bones | Imhotep (archive footage) (uncredited) | 1 |
| TV Show | 1958 | Shirley Temple's Storybook | Narrator (voice) / Father Knickerbocker | 1 |
| TV Show | 1965 | The Wild Wild West | Mr. Singh | 1 |
| TV Show | 1956 | Tony Awards | Self - Nominee | 1 |
