John Cossar Filmography
- Actor (144 credits)
- The Fire Detective (1929) Dist. Atty. Samuels
- Web of Fate (1927) Carlton Townsend
- Melting Millions (1927)
- The House Without a Key (1926) District Attorney
- The Sap (1926) Janet's Father
- His Wooden Wedding (1925)
- My Lady of Whims (1925) Severn
- Great Diamond Mystery (1924) Graves
- The Fast Express (1924)
- The Hunchback of Notre Dame (1923) Judge of the Court
- Fools and Riches (1923) President of the Railroad
- The Steel Trail (1923) Colonel John Armstrong
- Grand Larceny (1922) Emerson
- Watch Your Step (1922) Henry Slocum
- Voices of the City (1921) Garrison
- The Poverty of Riches (1921) Edward Phillips Sr
- Made in Heaven (1921) Mr. Hadden
- Doubling for Romeo (1921) Capulet
- Edgar, the Detective (1921)
- That Something (1920)
- Edgar's Hamlet (1920)
- When Fate Decides (1919) Egan
- Whom the Gods Would Destroy (1919)
- Love Insurance (1919) Thacker
- Common Clay (1919) Mr. Fullerton
- Vagabond Luck (1919) Jim Richardson
- Thieves (1919) Inspector
- The Feud (1919) Horace Summers
- The Long Arm of Mannister (1919) John Dyack
- Love Is Love (1919) Chief of Police
- The Highest Trump (1919) General Graham
- The Game's Up (1919) P. Van Rennselear Neyland
- Home (1919) John Deering
- A Pair of Sixes (1918) Applegate
- The Marriage Ring (1918) James Ward
- Beans (1918) Brewster
- Her Country First (1918) Franklin Grant
- The Guiding Hand (1917)
- The Bridge of Fancy (1917)
- Three Ways Out (1917)
- The Trufflers (1917) Dr. Hubbell Harkness
- The Uneven Road (1917)
- A Place in the Sun (1917)
- When Sorrow Weeps (1917)
- Two-Bit Seats (1917) Mr. Faulkner
- The Yellow Umbrella (1917)
- The Wonderful Event (1917)
- When the Man Speaks (1917) Horace Alvord
- The Season of Childhood (1917) John Holden
- On Trial (1917)
- Where Is My Mother? (1917)
- Pants (1917) Father of Poor Boy
- The Hoodooed Story (1917)
- The Fibbers (1917) Philip Allen
- Do Children Count? (1917) William Erling
- The Dream Doll (1917) Her Father
- The Fable of Prince Fortunatus, Who Moved Away from Easy Street, and Silas, the Saver, Who Moved In (1917)
- Desertion and Non-Support (1917)
- Fools for Luck (1917) Mr. Lamkin
- The Kingdom of Hope (1917) William Erling
- Gift o' Gab (1917) Mr. Dinsmore
- The Little White Girl (1917)
- Satan's Private Door (1917) Thomas Chatterton
- Steps to Somewhere (1917)
- Among Those Present (1917)
- The Final Fraud (1916)
- Twin Fates (1916)
- Politeness Pays (1916) Amos Broadstreet - a Millionaire
- Unto the Least of These (1916)
- The Prince of Graustark (1916) Baron Douglas
- Gold Dust (1916) John Strang - Head of the Firm
- The Chimney Sweep (1916) Colonel Wynne
- The Spider's Web (1916)
- What I Said Goes (1916)
- When Justice Won (1916) The Governor
- The Grouch (1916) Dr. Bradley
- Worth While (1916) Randolph Murray
- The Return of Eve (1916) John Raymond
- An Old-Fashioned Girl (1916) Mr. Galvin - Jane's Father
- The Chaperon (1916) Mr. Combs
- The Little Shepherd of Bargain Row (1916) Henry Hyman
- A Tale from the Decameron (1916)
- Millstones (1916) Bentley - Carstairs' Friend
- A Man's Work (1916) Pete Gillon
- The Misleading Lady (1916) John W. Cannell
- The Heart of Virginia Keep (1916)
- The Strange Case of Mary Page (1916) Prosecuting Attorney
- Orphan Joyce (1916) Mason - a Grain Speculator
- It Never Could Happen (1916)
- His Crucible (1915) Edward Marsden
- Tides That Meet (1915) Lopez Delgardo
- The Blindness of Virtue (1915) Lord Aberlady
- A Man Afraid (1915) Mr. Martin
- The Misjudged Mr. Hartley (1915) Mr. Worthington
- Blindfolded (1915) Andrew Meredith
- The Man Trail (1915) Elihu Peabody
- The Shanty at Trembling Hill (1915)
- The Sky Hunters (1915) Walt Benton
- The Family Divided (1915)
- The Secret's Price (1915) Heinrich Meyer
- The Counter Intrigue (1915) Gregory Ingram
- Inheritance (1915)
- The White Sister (1915) Minister of War
- The Old Sin (1915) Dan McAleer
- The Call of Yesterday (1915) Mr. Hoodshaw
- The Whirlpool (1915) Graham Howard
- The Wood Nymph (1915) Mr. Vandeveer
- On the Little Mill Trace (1915) Anton Floyd - a Millionaire
- The Crimson Wing (1915) Paul D'Arblay
- The Clutch of Circumstance (1915) The Governor
- The Law's Decree (1915) Count de Varney
- The Alster Case (1915) Trask
- Thirteen Down (1915) Robyna the Butler
- The Danger of Being Lonesome (1915) Signor Virtusio - a Musician
- The Lieutenant Governor (1915) Salvado (the millworker)
- The Elder Brother (1914) Leider
- The Long Cold Night (1914)
- Beyond Youth's Paradise (1914) Lord Fiennis
- The Girl from Thunder Mountain (1914) Mr. Wentworth
- Mrs. Trenwith Comes Home (1914) Ralph Eccles
- One Wonderful Night (1914) Horace P. Curtis
- Mongrel and Master (1914) Mr. Stone- Ruth's Father
- The Motor Buccaneers (1914) Lowe
- The Other Man (1914)
- A Letter from Home (1914) Clutton
- The Buffer (1914) Newton - the Forger
- The Night Hawks (1914) District Attorney Howard Varing
- Dawn and Twilight (1914)
- A Splendid Dishonor (1914) Detective Havers
- Whatsoever a Woman Soweth (1914) Mr. Caldwell - Robert's Father
- His Dearest Foes (1914) Chief Commissioner Wilkie
- Blind Man's Bluff (1914) Shelby Rutherford - the Husband
- Through the Storm (1914)
- The Place, the Time and the Man (1914) Alton Stearns
- Scars of Possession (1914) Dr. Gordon
- His Stolen Fortune (1914) Hotel Clerk
- Within Three Hundred Pages (1914) Lawyer Smirney
- The Song in the Dark (1914) John, a Bird Vendor
- Mrs. Billington's First Case (1914) The Shyster Lawyer
- Let No Man Escape (1914) Gordon Thorne
- The Spirit of the Madonna (1914) Supervisor
- A Gentleman of Leisure (1914) Dolly's Father
- The Wedding of Prudence (1914) Old Smith - Prudence's Father
- The Mystery of Room 643 (1914) Blackburn
