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| Año | Título | Personaje | Valoración |
|---|---|---|---|
| 1942 | Billy the Kid Trapped | Barfly | ★★★☆☆ |
| 1942 | The Lone Rider and the Bandit | Third Miner | ★★☆☆☆ |
| 1941 | The Son of Davy Crockett | Voter | ☆☆☆☆☆ |
| 1941 | In Old Cheyenne | Accordion Player | ★★☆☆☆ |
| 1941 | Sheriff of Tombstone | Bonanza Piano Player | ★★★☆☆ |
| 1941 | Billy the Kid in Santa Fe | Gambler (uncredited) | ★★☆☆☆ |
| 1941 | Billy The Kid's Round-Up | Man Reporting Murder | ★★★☆☆ |
| 1940 | The Cheyenne Kid | Posse Rider | ★★☆☆☆ |
| 1940 | Trailing Double Trouble | Barfly | ★★★☆☆ |
| 1940 | Young Bill Hickok | Piano Player | ★★☆☆☆ |
| 1940 | Billy the Kid in Texas | Barfly Watching Fight | ★★★☆☆ |
| 1940 | Billy the Kid's Gun Justice | Settler | ★★☆☆☆ |
| 1940 | Lightning Strikes West | Posse Rider | ★★☆☆☆ |
| 1939 | In Old Montana | Rancher | ★★☆☆☆ |
| 1939 | The Lone Ranger Rides Again | Settler | ★★★☆☆ |
| 1939 | Riders of the Sage | Powers Rider | ★★★☆☆ |
| 1939 | Rough Riders' Round-up | Musician | ★★★☆☆ |
| 1939 | Southward Ho! | Reb Soldier | ★★★★☆ |
| 1939 | Frontier Pony Express | Fiddler | ★★☆☆☆ |
| 1939 | New Frontier | Accordion Player | ★★★☆☆ |
| 1939 | In Old Monterey | Guitarist | ★★★☆☆ |
| 1939 | Sundown on the Prairie | Saloon Gunman (archive footage) | ☆☆☆☆☆ |
| 1938 | Whirlwind Horseman | Holt | ★★☆☆☆ |
| 1938 | The Feud Maker | Settler | ★★☆☆☆ |
| 1938 | Six-Gun Trail | Barfly | ★★★☆☆ |
| 1938 | Gunsmoke Trail | Gambler | ★★★☆☆ |
| 1938 | Starlight Over Texas | Henchman | ☆☆☆☆☆ |
| 1938 | Ghost Town Riders | ☆☆☆☆☆ | |
| 1937 | Sing Cowboy Sing | Townsman | ★★☆☆☆ |
| 1937 | The Feud of the Trail | Barfly | ★★☆☆☆ |
| 1937 | Valley of Terror | Piano Player | ★★★☆☆ |
| 1937 | Doomed at Sundown | Roulette Table Man | ★★☆☆☆ |
| 1937 | The Singing Buckaroo | Cowhand Musician | ☆☆☆☆☆ |
| 1937 | The Roaming Cowboy | Wagon Driver | ☆☆☆☆☆ |
| 1937 | Cheyenne Rides Again | Card Player | ★★★☆☆ |
| 1937 | The Silver Trail | Curt | ★★★☆☆ |
| 1937 | Moonlight on the Range | Deputy | ☆☆☆☆☆ |
| 1937 | Titanes de la velocidad | ★★☆☆☆ | |
| 1936 | Ambush Valley | Diggs | ★★☆☆☆ |
| 1936 | Gun Grit | Henchman Don | ★★☆☆☆ |
| 1936 | Vengeance of Rannah | Henchman Nolan | ☆☆☆☆☆ |
| 1936 | Headin' for the Rio Grande | Henchman | ☆☆☆☆☆ |
| 1936 | The Unknown Ranger | Fiddle Player (uncredited) | ☆☆☆☆☆ |
| 1936 | Rio Grande Ranger | Barfly (uncredited) | ☆☆☆☆☆ |
| 1936 | Aces and Eights | Gambler (uncredited) | ★★★☆☆ |
| 1936 | The Fugitive Sheriff | Fiddler (uncredited) | ☆☆☆☆☆ |
| 1936 | Red River Valley | Construction Worker (uncredited) | ★★★☆☆ |
| 1935 | North of Arizona | Fiddle Player | ★★☆☆☆ |
| 1935 | Gun Play | Tobacco Chewer (uncredited) | ★★★☆☆ |
| 1935 | Western Frontier | Barfly | ☆☆☆☆☆ |
| 1935 | Texas Jack | Tuck, A Minstrel (Nip in Credits) | ☆☆☆☆☆ |
| 1934 | Border Guns | Barfly | ☆☆☆☆☆ |
Películas destacadas de Oscar Gahan
Estas son las películas más destacadas en las que ha trabajdo:
