| Bat Masterson | 1958 | Newspaper Reporter | TV Show |
| Bronco | 1958 | Ab / Clerk | TV Show |
| Flesh and the Spur | 1957 | Kale Tanner | Movie |
| The Astounding She-Monster | 1957 | Nat Burdell | Movie |
| Colt .45 | 1957 | Telegrapher | TV Show |
| Tombstone Territory | 1957 | Bartender | TV Show |
| Revolt at Fort Laramie | 1957 | Capt. Foley (uncredited) | Movie |
| The Iron Sheriff | 1957 | Leveret's Brother-in-Law (uncredited) | Movie |
| The Parson and the Outlaw | 1957 | Matt McCloud (uncredited) | Movie |
| The Californians | 1957 | Referee | TV Show |
| Outlaw Queen | 1957 | Sheriff | Movie |
| Circus Boy | 1956 | Barlow | TV Show |
| Cheyenne | 1955 | Lynch Mob Head | TV Show |
| My Friend Flicka | 1955 | | TV Show |
| Sergeant Preston of the Yukon | 1955 | Ram Stevens / Sam / Pete Pringle | TV Show |
| Tales of the Texas Rangers | 1955 | Norm | TV Show |
| The Adventures of Champion | 1955 | Craig / Brice | TV Show |
| The Life and Legend of Wyatt Earp | 1955 | Caldwell / Kendall / Duecey Miller / ... | TV Show |
| Hell's Horizon | 1955 | Maj. Naylor | Movie |
| Buffalo Bill, Jr. | 1955 | Hugh Clemens / Mike West | TV Show |
| Annie Oakley | 1954 | Frank / Henchman Rick / Simpson - Henchman / ... | TV Show |
| The Lawless Rider | 1954 | Freno Frost | Movie |
| Crossroad Avenger: The Adventures of the Tucson Kid | 1953 | Lefty | TV Movie |
| On Top of Old Smoky | 1953 | McQuaid | Movie |
| Jack McCall Desperado | 1953 | Gang Member at Party (uncredited) | Movie |
| Pack Train | 1953 | Ross McLain | Movie |
| Death Valley Days | 1952 | McConnell / Bartender / Nevada Secretary of State / ... | TV Show |
| Indian Uprising | 1952 | Lt. Richards (uncredited) | Movie |
| The Frontier Phantom | 1952 | Sam Mantell (as Kenne Duncun) | Movie |
| Drums in the Deep South | 1951 | Union Officer (uncredited) | Movie |
| The Texas Rangers | 1951 | Bart Howard - Outlaw (uncredited) | Movie |
| Adventures of Wild Bill Hickok | 1951 | Pete / Gus / Ben / ... | TV Show |
| Sky King | 1951 | Matt / Murdock | TV Show |
| The Adventures of Kit Carson | 1951 | Major Talbot / Colonel / Monte Merringer - Henchman / ... | TV Show |
| The Range Rider | 1951 | Clem - Henchman / Mort Brown / Lawyer John Barton / ... | TV Show |
| Silver Canyon | 1951 | Corporal (uncredited) | Movie |
| The Hills of Utah | 1951 | Indigo Hubbard - Henchman | Movie |
| Wanted: Dead or Alive | 1951 | Henchman (uncredited) | Movie |
| Whirlwind | 1951 | Slim (uncredited) | Movie |
| Nevada Badmen | 1951 | Bob Bannon (uncredited) | Movie |
| Oklahoma Justice | 1951 | Sheriff Barnes | Movie |
| Badman's Gold | 1951 | Rance | Movie |
| A Life of Her Own | 1950 | Man Asking Invitation (uncredited) | Movie |
| Davy Crockett, Indian Scout | 1950 | Sgt. Gordon (as Kenneth Duncan) | Movie |
| The Cisco Kid | 1950 | Sheriff / Station Agent | TV Show |
| The Gene Autry Show | 1950 | Sheriff Tim McBride / Sheriff / Thatcher Bowden / ... | TV Show |
| Indian Territory | 1950 | 3rd Man Shot by Apache (uncredited) | Movie |
| Jiggs and Maggie Out West | 1950 | Slim - Henchman (uncredited) | Movie |
| Last of the Buccaneers | 1950 | Pirate Captain (uncredited) | Movie |
| Mule Train | 1950 | Latigo (uncredited) | Movie |
| Radar Secret Service | 1950 | Michael's Henchman | Movie |
| Surrender | 1950 | Rider Warning of Gregg (uncredited) | Movie |
| The Blazing Sun | 1950 | Al Bartlett & Mark Bartlett | Movie |
| A Wonderful Life | 1950 | Brace Doctor (uncredited) | Short Film |
| Code of the Silver Sage | 1950 | Dick Cantwell - Henchman | Movie |
| Western Courage | 1950 | Chuck Gorman | Short Film |
| Batman and Robin | 1949 | Gabe (uncredited) | Movie |
| Riders in the Sky | 1949 | Travis | Movie |
| The Lone Ranger | 1949 | Sheriff Dunn / Deputy Joe Parker / Jeff Barnes | TV Show |
| Across the Rio Grande | 1949 | Joe Bardet | Movie |
| Sons of New Mexico | 1949 | Ed - Henchman (uncredited) | Movie |
| Stampede | 1949 | Steve (uncredited) | Movie |
| Crashing Thru | 1949 | Ranger Tim Reymond | Movie |
| Deputy Marshal | 1949 | Cal Freeling | Movie |
| Gun Runner | 1949 | Nebraska | Movie |
| Law of the West | 1949 | Frank Stevens | Movie |
| Lawless Code | 1949 | Tom Blaine - Henchman | Movie |
| Range Land | 1949 | Sheriff Winters | Movie |
| Shadows of the West | 1949 | Bill Mayberry | Movie |
| Roaring Westward | 1949 | Morgan | Movie |
| West of El Dorado | 1949 | Steve Dallas | Movie |
| Range Justice | 1949 | Kirk | Movie |
| Close-Up | 1948 | Detective (uncredited) | Movie |
| Hidden Danger | 1948 | Henchman Bender | Movie |
| Sundown in Santa Fe | 1948 | Wagon Driver (uncredited) | Movie |
| Echo Ranch | 1948 | Gang Leader | Short Film |
| Hidden Valley Days | 1948 | Outlaw Leader | Short Film |
| Powder River Gunfire | 1948 | Kenne | Short Film |
| Angel and the Badman | 1947 | Gambler (uncredited) | Movie |
| Buck Privates Come Home | 1947 | Sergeant on Sidewalk (uncredited) | Movie |
| Twilight on the Rio Grande | 1947 | Lou Evers - U.S. Customs Agent (uncredited) | Movie |
| The Trespasser | 1947 | Fellow (uncredited) | Movie |
| My Pal Trigger | 1946 | Croupier | Movie |
| The Crimson Ghost | 1946 | Dr. Chambers [Chs. 1-2, 8 | Movie |
| The Phantom Rider | 1946 | Ben Brady - Henchman | Movie |
| California Gold Rush | 1946 | Henchman Felton | Movie |
| G.I. War Brides | 1946 | | Movie |
| Home on the Range | 1946 | Henchman | Movie |
| In Old Sacramento | 1946 | Deputy (uncredited) | Movie |
| Night Train to Memphis | 1946 | Asa Morgan | Movie |
| Rainbow Over Texas | 1946 | Henchman Pete McAvoy | Movie |
| Roll on Texas Moon | 1946 | Henchman Brannigan | Movie |
| Sioux City Sue | 1946 | Crawley (uncredited) | Movie |
| Sun Valley Cyclone | 1946 | Dow | Movie |
| The Mysterious Mr. Valentine | 1946 | Sam Priestly | Movie |
| A Guy Could Change | 1946 | Frank Hanlon | Movie |
| Man from Rainbow Valley | 1946 | Tracy's Partner | Movie |
| Red River Renegades | 1946 | Henchman Hackett | Movie |
| Rio Grande Raiders | 1946 | Steve - Henchman | Movie |
| Santa Fe Uprising | 1946 | Henchman | Movie |
| The Scarlet Horseman | 1946 | Henchman (uncredited) | Movie |
| Sheriff of Redwood Valley | 1946 | Henchman Jackson | Movie |
| Traffic in Crime | 1946 | Henchman (uncredited) | Movie |
| Conquest of Cheyenne | 1946 | Geologist McBride | Movie |
| Dakota | 1945 | Henchman (uncredited) | Movie |
| Flame of Barbary Coast | 1945 | Saloon Patron (uncredited) | Movie |
| Manhunt of Mystery Island | 1945 | Sidney Brand | Movie |
| Oregon Trail | 1945 | Johnny Slade | Movie |
| The Purple Monster Strikes | 1945 | Charles Mitchell | Movie |
| Bells of Rosarita | 1945 | Kidnapper (uncredited) | Movie |
| Corpus Christi Bandits | 1945 | Spade | Movie |
| Love, Honor and Goodbye | 1945 | Counter Man (uncredited) | Movie |
| The Phantom Speaks | 1945 | Murder Victim (uncredited) | Movie |
| Wagon Wheels Westward | 1945 | Henchman Joe | Movie |
| Hitchhike to Happiness | 1945 | Man in Bar (uncredited) | Movie |
| Road to Alcatraz | 1945 | Servant | Movie |
| Rough Riders of Cheyenne | 1945 | Lance Davis | Movie |
| Santa Fe Saddlemates | 1945 | Brazos Kane | Movie |
| A Sporting Chance | 1945 | Boarder | Movie |
| Trail of Kit Carson | 1945 | Trigger Chandler | Movie |
| The Chicago Kid | 1945 | Al | Movie |
| Brazil | 1944 | Cab Driver (uncredited) | Movie |
| Captain America | 1944 | Ed Graham [Ch. 14] (uncredited) | Movie |
| Hands Across the Border | 1944 | Deputy (uncredited) | Movie |
| San Fernando Valley | 1944 | Horse Thief (uncredited) | Movie |
| Song of Nevada | 1944 | Thompson's Wagon-Race Driver (uncredited) | Movie |
| The Fighting Seabees | 1944 | Construction Worker (uncredited) | Movie |
| The Tiger Woman | 1944 | Gentry - Henchman [Chs. 7, 11 | Movie |
| Cheyenne Wildcat | 1944 | Henchman Pete | Movie |
| End of the Road | 1944 | Al Herman | Movie |
| Haunted Harbor | 1944 | Gregg | Movie |
| Man from Frisco | 1944 | Foreman (uncredited) | Movie |
| Marshal of Reno | 1944 | Adams - Henchman | Movie |
| Sheriff of Sundown | 1944 | Arthur Wilkes | Movie |
| Silent Partner | 1944 | Gangster (uncredited) | Movie |
| Storm Over Lisbon | 1944 | Paul--Deresco Aide | Movie |
| The Girl Who Dared | 1944 | Dr. Paul Dexter | Movie |
| Tucson Raiders | 1944 | Henchman (voice, uncredited) | Movie |
| Beneath Western Skies | 1944 | Deputy Barrow | Movie |
| Hidden Valley Outlaws | 1944 | Henchman Ben Bannon | Movie |
| The Laramie Trail | 1944 | Bud's Partner (uncredited) | Movie |
| Mojave Firebrand | 1944 | Tony Webb | Movie |
| My Buddy | 1944 | Convict (uncredited) | Movie |
| Outlaws of Santa Fe | 1944 | Chuck - Henchman | Movie |
| Pride of the Plains | 1944 | Snyder - Henchman | Movie |
| Secrets of Scotland Yard | 1944 | Steward (uncredited) | Movie |
| Sheriff of Las Vegas | 1944 | Whitey - Henchman | Movie |
| Stagecoach to Monterey | 1944 | Joe | Movie |
| Thoroughbreds | 1944 | | Movie |
| Vigilantes of Dodge City | 1944 | Henchman Dave Brewster | Movie |
| In Old Oklahoma | 1943 | Indignant Businessman on Train (uncredited) | Movie |
| Batman | 1943 | Fred - the Mechanic [Ch. 5-6] (uncredited) | Movie |
| Blazing Guns | 1943 | Henchman Red Higgins (as Ken Duncan) | Movie |
| Cheyenne Roundup | 1943 | Express Rider (uncredited) | Movie |
| Daredevils of the West | 1943 | George Hooker (as Ken Duncan) | Movie |
| Swing Shift Maisie | 1943 | Charlie - Ann's Blind Date (uncredited) | Movie |
| The Kid Rides Again | 1943 | Cowboy in Saloon (uncredited) | Movie |
| The Man from the Rio Grande | 1943 | Henchman | Movie |
| Wagon Tracks West | 1943 | Henchman (uncredited) | Movie |
| Wild Horse Stampede | 1943 | Hanley (as Ken Duncan) | Movie |
| Wolves of the Range | 1943 | Henchman Adams (as Ken Duncan) | Movie |
| The Avenging Rider | 1943 | Blackie (as Kenneth Duncan) | Movie |
| Blazing Frontier | 1943 | Homesteader Clark (uncredited) | Movie |
| Border Buckaroos | 1943 | Tom Bancroft (as Ken Duncan) | Movie |
| Canyon City | 1943 | Turner - Henchman (uncredited) | Movie |
| Days of Old Cheyenne | 1943 | Henchman Pete (as Ken Duncan) | Movie |
| Fugitive from Sonora | 1943 | R. J. Cole (as Ken Duncan) | Movie |
| The Law Rides Again | 1943 | Sheriff Jeff (as Ken Duncan) | Movie |
| Overland Mail Robbery | 1943 | Hank (uncredited) | Movie |
| Pistol Packin' Mama | 1943 | Doorman (uncredited) | Movie |
| Raiders of Sunset Pass | 1943 | Henchman Tex | Movie |
| Santa Fe Scouts | 1943 | Henchman (uncredited) | Movie |
| Trail of Terror | 1943 | Henchman Tom | Movie |
| Perils of Nyoka | 1942 | Abu (as Kenneth Duncan) | Movie |
| Code of the Outlaw | 1942 | Plug (as Ken Duncan) | Movie |
| Heart of the Rio Grande | 1942 | Train Passenger (uncredited) | Movie |
| Isle of Missing Men | 1942 | Bob Henderson (as Kenneth Duncan) | Movie |
| Law and Order | 1942 | Henchman Durgan (as Ken Duncan) | Movie |
| Man with Two Lives | 1942 | Jess Fowler (as Kenneth Duncan) | Movie |
| Outlaws of Boulder Pass | 1942 | Mulie (as Ken Duncan) | Movie |
| Overland Stagecoach | 1942 | Posse Rider (uncredited) | Movie |
| Raiders of the West | 1942 | Harris - Dandy Gambler (uncredited) | Movie |
| Texas to Bataan | 1942 | Captain Anders (as Kenneth Duncan) | Movie |
| The Secret Code | 1942 | Marvin [Chs.1-3,5-6 | Movie |
| The Sombrero Kid | 1942 | Pete Raymond (uncredited) | Movie |
| The Valley of Vanishing Men | 1942 | Logan (uncredited) | Movie |
| Valley of Hunted Men | 1942 | Nazi (uncredited) | Movie |
| Westward Ho! | 1942 | Henchman Dallas (uncredited) | Movie |
| Foreign Agent | 1942 | Tom- Federal Agent (uncredited) | Movie |
| The Lone Rider and the Bandit | 1942 | Saloon Henchman (uncredited) | Movie |
| The Lone Rider in Cheyenne | 1942 | Deputy Walt (as Ken Duncan) | Movie |
| Queen of Broadway | 1942 | Bank Teller | Movie |
| The Sundown Kid | 1942 | Henchman (as Ken Duncan) | Movie |
| Texas Man Hunt | 1942 | Henchman Lake | Movie |
| Trail Riders | 1942 | Marshal Frank Hammond (as Kenneth Duncan) | Movie |
| Red River Robin Hood | 1942 | Henchman Ed Rance (as Kenneth Duncan) | Movie |
| Adventures of Captain Marvel | 1941 | Barnett - Chief Henchman [Ch. 2-10] (as Kenneth Duncan) | Movie |
| Buck Privates | 1941 | Sergeant on Sidewalk with Sgt. Collins (uncredited) | Movie |
| The Spider Returns | 1941 | Ram Singh, Wentworth's Hindu Chauffeur (as Kenneth Duncan) | Movie |
| Billy the Kid in Santa Fe | 1941 | Henchman Scotty (as Ken Duncan) | Movie |
| Billy the Kid Wanted | 1941 | Henchman (uncredited) | Movie |
| King of the Texas Rangers | 1941 | Nick - Henchman [Chs. 1-4,6-9] (as Kenneth Duncan) | Movie |
| The Deadly Game | 1941 | Henchman (as Kenneth Duncan) | Movie |
| White Eagle | 1941 | Kirk (uncredited) | Movie |
| The Apache Kid | 1941 | Henchman Benton (uncredited) | Movie |
| Billy the Kid's Round-up | 1941 | Henchman Joe (uncredited) | Movie |
| Dynamite Canyon | 1941 | Henchman Rod (as Ken Duncan) | Movie |
| The Lone Rider Fights Back | 1941 | Barfly (uncredited) | Movie |
| Outlaws of the Rio Grande | 1941 | Marshal Bob Day (as Ken Duncan) | Movie |
| Riding the Sunset Trail | 1941 | Jay Lynch (as Ken Duncan) | Movie |
| The Texas Marshal | 1941 | Henchman Lefty (uncredited) | Movie |
| A Missouri Outlaw | 1941 | Henchman Pete Chandler (as Ken Duncan) | Movie |
| The Green Archer | 1940 | Michael Bellamy (uncredited) | Movie |
| Billy the Kid Outlawed | 1940 | Dave Hendricks (as Ken Duncan) | Movie |
| Billy the Kid's Gun Justice | 1940 | Bragg (as Ken Duncan) | Movie |
| Deadwood Dick | 1940 | Two-Gun (uncredited) | Movie |
| Emergency Squad | 1940 | Jack (uncredited) | Movie |
| I Take This Oath | 1940 | Car-Rental Clerk (uncredited) | Movie |
| Murder on the Yukon | 1940 | Tom - Henchman (as Kenneth Duncan) | Short Film |
| Sky Bandits | 1940 | Brownie - Henchman (as Ken Duncan) | Movie |
| Roll Wagons Roll | 1940 | Captain Clay (as Kenneth Duncan) | Movie |
| Arizona Gang Busters | 1940 | Sheriff Dan Kirk (as Kenneth Duncan) | Movie |
| The Cheyenne Kid | 1940 | Chet Adams (as Kenneth Duncan) | Movie |
| Covered Wagon Trails | 1940 | Blaine - Henchman (as Kenneth Duncan) | Movie |
| Frontier Crusader | 1940 | The Mesa Kid (as Ken Duncan) | Movie |
| The Kid from Santa Fe | 1940 | Joe Lavida | Movie |
| Land of the Six Guns | 1940 | Max (as Kenneth Duncan) | Movie |
| Pinto Canyon | 1940 | Fred Jones (as Kenneth Duncan) | Movie |
| The Sagebrush Family Trails West | 1940 | Bart Wallace | Movie |
| Texas Renegades | 1940 | Bill Willis (as Kenneth Duncan) | Movie |
| Trailing Double Trouble | 1940 | Bob Horner (as Ken Duncan) | Movie |
| Souls in Pawn | 1940 | J.W. Carlton | Movie |
| Buck Rogers | 1939 | Lieutenant Lacy (as Kenneth Duncan) | Movie |
| The Fighting Renegade | 1939 | Henchman (uncredited) | Movie |
| Flaming Lead | 1939 | Larry - Ranch Hand (as Kenneth Duncan) | Movie |
| The Man from Texas | 1939 | Speed Dennison (as Kenneth Duncan) | Movie |
| Mickey the Kid | 1939 | Henchman (uncredited) | Movie |
| North of the Yukon | 1939 | Henchman Meeker (as Kenneth Duncan) | Movie |
| Overland with Kit Carson | 1939 | Trapper (uncredited) | Movie |
| Trigger Fingers | 1939 | Henchman Johnson (as Ken Duncan) | Movie |
| Westbound Stage | 1939 | Capt. Jim (as Kenneth Duncan) | Movie |
| Fighting Thoroughbreds | 1939 | Brady (as Kenneth Duncan) | Movie |
| Flash Gordon's Trip to Mars | 1938 | Airdrome Captain (as Kenneth Duncan) | Movie |
| The Spider's Web | 1938 | Ram Singh (as Kenneth Duncan) | Movie |
| Frontier Scout | 1938 | Crandall - Henchman (as Kenneth Duncan) | Movie |
| The Great Adventures of Wild Bill Hickok | 1938 | Blacksmith (Ch.13) (uncredited) | Movie |
| The Colorado Kid | 1937 | Sims Leather (as Kenneth Duncan) | Movie |
| The Last Curtain | 1937 | Garsatti (as Kenneth Duncan) | Movie |
| Make-Up | 1937 | Lorenzo (as Kenneth Duncan) | Movie |
| Cross My Heart | 1937 | Steve King (as Kenneth Duncan) | Movie |
| Nine to Nine | 1935 | John Sommerset (as Kenneth Duncan) | Movie |
| Gallant Defender | 1935 | Goose Neck Smith (uncredited) | Movie |
| Thoroughbred | 1935 | Chic / Chick Williams (as Kenneth Duncan) | Movie |
| Undercover Men | 1934 | Blake Hardy (as Kenneth Duncan) | Movie |
| Shadow River | 1933 | | Short Film |
| The Mouthpiece | 1932 | Office Worker (uncredited) | Movie |
| Lovers Courageous | 1932 | Cowboy (uncredited) | Movie |
| Probation | 1932 | Wedding Rehearsal Attendant (uncredited) | Movie |
| No Limit | 1931 | Curly Andrews | Movie |
| Grief Street | 1931 | Newspaper Reporter (uncredited) | Movie |
| A Man from Wyoming | 1930 | Haley (uncredited) | Movie |
| Derelict | 1930 | Radio Man (uncredited) | Movie |
| Police Reporter | 1928 | | Movie |
| Secret Outlaw, The | 1928 | | Short Film |
| Saps and Saddles | 1928 | | Short Film |
| Almost Human | 1927 | Clint Scollard (as Ken Duncan) | Short Film |
