John B. O'Brien Filmography
- Actor (88 credits)
- The Vigilantes Are Coming (1936) Robert Loring (Ch. 1), not listed in credits
- The Spirit of Notre Dame (1931) играет самого себя
- Noisy Noises (1929) Lemon vendor
- Saturday's Lesson (1929) The Devil
- Cat, Dog & Co. (1929) Fruit Vendor, not listed in credits
- Their Purple Moment (1928) Pink Pub Patron, not listed in credits
- Big Red Riding Hood (1925) Car Thief
- Action Galore (1925) Strike Carney
- A Streak of Luck (1925) Jack Hurst
- Wide Open Spaces (1924) not listed in credits
- The Iron Horse (1924) Dinny, not listed in credits
- Zeb vs. Paprika (1924)
- Postage Due (1924)
- Brothers Under the Chin (1924)
- The Noon Whistle (1923) A millworker
- The Soilers (1923)
- Bride's Play (1922) Marquis of Muckross
- The Black Bag (1922) Martin
- Annabelle Lee (1921) David Martin
- Thunder Island (1921) Paul Corbin
- A Daughter of the Law (1921) Jim Garth
- Why Girls Leave Home (1921) Joseph
- Molly O' (1921) Minor Role, not listed in credits
- Love's Penalty (1921) Bud Gordon
- Bride 13 (1920) Lt. Bob Norton
- Queens Up! (1920)
- The Stealers (1920) Man of Dawn
- Bab's Diary (1917) Harold Valentine
- The Little Mascot (1916) Jack O'Brien
- The Woman He Married (1915)
- The Legend Beautiful (1915) Prospector
- His Lesson (1915) Participant in Mob Scene, not listed in credits
- A Rude Awakening (1914) Grant
- The Double Knot (1914)
- The Second Mrs. Roebuck (1914)
- An Eye for an Eye (1913) Tom Kirby
- The Puncher's New Love (1911)
- The Corporation and the Ranch Girl (1911)
- The Count and the Cowboys (1911)
- The Faithful Indian (1911)
- The Dude (1911)
- Spike Shannon's Last Fight (1911) The Opponent
- The Tribe's Penalty (1911)
- The Infant at Snakeville (1911)
- The Lucky Card (1911)
- The Sheriff's Chum (1911)
- Alkali Ike's Auto (1911)
- Across the Plains (1911) The Cowboy's Friend
- A Western Redemption (1911) Steve Wilson
- The Ranchman's Son (1911) Allen Harley - the Ranchman's Son
- The Indian Maiden's Lesson (1911)
- The Forest Ranger (1910)
- The Ranchman's Feud (1910) The Second Ranchman's Son
- The Pony Express Rider (1910) Pony O'Brien
- A Ranchman's Wooing (1910)
- A Cowboy's Vindication (1910)
- The Cowboy and the Squaw (1910)
- Pals of the Range (1910) Jack Hartley
- The Count That Counted (1910)
- The Mexican's Faith (1910) The Scoundrel
- Away Out West (1910) Second Prospector
- A Close Shave (1910)
- Under Western Skies (1910) The Bartender
- Electric Insoles (1910)
- The Girl and the Fugitive (1910)
- The Ranger's Bride (1910) Man In Black Vest
- The Bad Man and the Preacher (1910) Snake Williams
- The Bad Man's Last Deed (1910)
- The Deputy's Love (1910)
- Take Me Out to the Ball Game (1910)
- The Masquerade Cop (1910)
- The Cowboy's Sweetheart (1910)
- A Flirty Affliction (1910) Officer O'Rourke
- The Little Doctor of the Foothills (1910)
- The Silent Message (1910)
- Method in His Madness (1910) Man Outside Third Bar
- Circle C Ranch's Wedding Present (1910)
- The Mistaken Bandit (1910)
- He Met the Champion (1910) Man in Top Hat
- Won by a Hold-Up (1910) Bill's Friend
- The Dumb Half Breed's Defense (1910)
- The Outlaw's Sacrifice (1910) The Rival
- Hank and Lank: As Sandwich Men (1910) The Cook
- The Cowpuncher's Ward (1910)
- His Reformation (1909)
- The Best Man Wins (1909)
- The Ranchman's Rival (1909) Walter Milton
- The Heart of a Cowboy (1909)
- Director (49 credits)
- Those Who Dare (1924)
- Father Tom (1921)
- Lonely Heart (1921)
- The Bishop's Emeralds (1919)
- Impossible Catherine (1919)
- The Street of Seven Stars (1918)
- The Inn of the Blue Moon (1918)
- The Girl and the Judge (1918)
- Mary Lawson's Secret (1917)
- Maternity (1917)
- Her Sister (1917)
- The Buffalo Bill Show (1917)
- Daughter of Maryland (1917)
- The Unforseen (1917)
- Souls Triumphant (1917)
- Queen X (1917)
- Reputation (1917)
- Vanity (1916)
- The Eternal Grind (1916)
- The Big Sister (1916)
- The Flying Torpedo (1916)
- The Foundling (1916)
- Hulda from Holland (1916)
- Destiny's Toy (1916)
- Big Jim's Heart (1915)
- What Might Have Been (1915)
- The Foundling (1915)
- The Outcast (1915)
- Her Shattered Idol (1915)
- An Obstinate Sheriff (1915)
- Captain Macklin (1915)
- The Tear That Burned (1914)
- The Body in the Trunk (1914)
- The Folly of Anne (1914)
- The Old Fisherman's Story (1914)
- The Old Maid (1914)
- The Final Verdict (1914)
- For Her Father's Sins (1914)
- The Second Mrs. Roebuck (1914)
- The Angel of Contention (1914)
- Life's Lottery (1914)
- Back to the Kitchen (1914)
- The Different Man (1914)
- Sierra Jim's Reformation (1914)
- The Miniature Portrait (1914)
- The Getaway (1914)
- The Mystery of the Hindu Image (1914)
- Lest We Forget (1914)
- Life on the Circle Ranch in California (1912)
- Producer (1 credits)
- Writer (2 credits)