| They Shall Have Music | 1939 | Davis | Movie |
| Boys' Reformatory | 1939 | Superintendent Keene | Movie |
| International Crime | 1938 | Gerald Morton | Movie |
| Mr. Wong, Detective | 1938 | Carl Roemer | Movie |
| The Mysterious Rider | 1938 | Townsman | Movie |
| Phantom Ranger | 1938 | Pat Doyle | Movie |
| Saleslady | 1938 | Crane | Movie |
| A Day at the Races | 1937 | Musician in orchestra | Movie |
| Paradise Isle | 1937 | Coxon | Movie |
| The Shadow Strikes | 1937 | Mr. Delthern | Movie |
| Woman in Distress | 1937 | Duval | Movie |
| Borderland | 1937 | Doctor | Movie |
| Jungle Menace | 1937 | Edward Elliott [Ch.1 | Movie |
| Rustlers' Valley | 1937 | Banker Crawford | Movie |
| The Dark Hour | 1936 | Dr. Munro | Movie |
| Call of the Prairie | 1936 | Banker Jim | Movie |
| The Border Patrolman | 1936 | Manning | Movie |
| Three on the Trail | 1936 | Sheriff Sam Corwin | Movie |
| Below the Deadline | 1936 | Mr. Abrams | Movie |
| Death from a Distance | 1935 | Prof. Trowbridge | Movie |
| Magnificent Obsession | 1935 | Seabury - Ex-patient | Movie |
| The Lady in Scarlet | 1935 | Jerome T. Shelby | Movie |
| The President Vanishes | 1934 | | Movie |
| Guilty Parents | 1934 | Defense attorney | Movie |
| The World Gone Mad | 1933 | Grover Cromwell | Movie |
| Cocktail Hour | 1933 | French Police Investigator | Movie |
| Notorious But Nice | 1933 | John J. Martin | Movie |
| Terror Trail | 1933 | Colonel Charles Ormsby | Movie |
| King of the Arena | 1933 | Texas Governor | Movie |
| Sing, Sinner, Sing | 1933 | James Parks | Movie |
| Call Her Savage | 1932 | Doctor Consoling Nasa | Movie |
| If I Had a Million | 1932 | Glidden Associate | Movie |
| Symphony of Six Million | 1932 | Dr. Schifflen | Movie |
| The Match King | 1932 | Banker | Movie |
| Alias the Doctor | 1932 | Dr. Niergardt | Movie |
| The Crusader | 1932 | Robert Henley | Movie |
| False Faces | 1932 | Dr. McDonald | Movie |
| Forbidden Company | 1932 | David Grant | Movie |
| The Gambling Sex | 1932 | John Tracy | Movie |
| Lena Rivers | 1932 | John Nichols | Movie |
| The Yellow Ticket | 1931 | Passport Official at Airport | Movie |
| Beau Ideal | 1931 | Judge Advocate (as John M. St. Polis) | Movie |
| Doctors' Wives | 1931 | Dr. Mark Wyndram | Movie |
| Heartbreak | 1931 | U.S. Ambassador | Movie |
| The Gay Diplomat | 1931 | General | Movie |
| Men of the Sky | 1931 | Madeleine's Father | Movie |
| Transgression | 1931 | Serafin, Arturo's Butler | Movie |
| Their Mad Moment | 1931 | Hotel Manager | Movie |
| A Devil with Women | 1930 | Don Diego | Movie |
| Party Girl | 1930 | John Rountree | Movie |
| The Criminal Code | 1930 | Dr. Rinewulf | Movie |
| Captain Thunder | 1930 | Pedro (as John Sainpolis) | Movie |
| Kismet | 1930 | The Imam Mahmud | Movie |
| The Bad One | 1930 | Judge | Movie |
| The Three Sisters | 1930 | Judge | Movie |
| In the Next Room | 1930 | Philip Vantine | Movie |
| Melody Man | 1930 | Von Kemper | Movie |
| Guilty? | 1930 | Polk | Movie |
| Coquette | 1929 | Dr. John Besant | Movie |
| Fast Life | 1929 | Andrew Stratton | Movie |
| The Diplomats | 1929 | The King of Belgravia | Short Film |
| Why Be Good? | 1929 | Pa Kelly (as John Sainpolis) | Movie |
| The Grain of Dust | 1928 | Mr. Burroughs | Movie |
| Marriage by Contract | 1928 | Father | Movie |
| The Power of Silence | 1928 | Defense Attorney | Movie |
| A Woman's Way | 1928 | Mouvet | Movie |
| The Gun Runner | 1928 | The Presidente | Movie |
| The Unknown | 1927 | Surgeon | Movie |
| Too Many Crooks | 1927 | Erastus Mason | Movie |
| The Return of Peter Grimm | 1926 | Andrew McPherson | Movie |
| The Far Cry | 1926 | Count Filippo Sturani (as John Sainpolis) | Movie |
| The Greater Glory | 1926 | Professor Leopold Eberhardt (as John Sainpolis) | Movie |
| The Lily | 1926 | Comte de Maigny | Movie |
| The Phantom of the Opera | 1925 | Comte Philip de Chagny (as John Sainpolis) | Movie |
| My Lady's Lips | 1925 | Inspector (as John Sainpolis) | Movie |
| Paint and Powder | 1925 | Mark Kelsey (as John Sainpolis) | Movie |
| The Alaskan | 1924 | Rossland (as John Sainpolis) | Movie |
| A Fool's Awakening | 1924 | Lt. Wedderburn (as John Sainpolis) | Movie |
| In Every Woman's Life | 1924 | Dr. Philip Logan (as John Sainpolis) | Movie |
| Mademoiselle Midnight | 1924 | Colonel de Gontran (Prologue) (as John Sainpolis) | Movie |
| The Rose of Paris | 1924 | André du Vallois (as John Sainpolis) | Movie |
| Those Who Dance | 1924 | Monahan (as John Sainpolis) | Movie |
| Three Weeks | 1924 | The King (as John Sainpolis) | Movie |
| The Dixie Handicap | 1924 | Dexter (as Johnny Sainpolis) | Movie |
| Folly of Vanity | 1924 | Ridgeway (modern sequence) (as John Sainpolis) | Movie |
| Souls for Sale | 1923 | John Sainpolis (as John Sainpolis) | Movie |
| The Untameable | 1923 | Dr. Copin (as John Sainpolis) | Movie |
| The Hero | 1923 | Andrew Lane (as John Sainpolis) | Movie |
| Three Wise Fools | 1923 | John Crawshay (as John Sainpolis) | Movie |
| Woman-Proof | 1923 | Milo Bleech (as John Sainpolis) | Movie |
| The Social Code | 1923 | Defense Attorney (as John Sainpolis) | Movie |
| A Prince of a King | 1923 | Mario (as John Sainpolis) | Movie |
| Held to Answer | 1923 | Hiram Burbeck (as John Sainpolis) | Movie |
| Shadows | 1922 | Nate Snow | Movie |
| The Four Horsemen of the Apocalypse | 1921 | Etienne Laurier (as John Sainpolis) | Movie |
| Cappy Ricks | 1921 | Skinner (as John Sainpolis) | Movie |
| The Great Lover | 1920 | Jean Paurel | Movie |
| Old Dad | 1920 | Jeffrey Bretton (as John Sainpolis) | Movie |
| All Woman | 1918 | Sam Tupper (as John Sainpolis) | Movie |
| Laughing Bill Hyde | 1918 | Black Jack Burg (as John Sainpolis) | Movie |
| Resurrection | 1918 | Simonson (as John Sainpolis) | Movie |
| The Fortunes of Fifi | 1917 | Duvernet (as John Sainpolis) | Movie |
| Sapho | 1917 | Dejoie (as John Sainpolis) | Movie |
| Sleeping Fires | 1917 | Edwin Bryce (as John Sainpolis) | Movie |
| The Mark of Cain | 1917 | Judge Hoyt (as John Sainpolis) | Movie |
| The Love That Lives | 1917 | Harvey Brooks (as John Sainpolis) | Movie |
| The Salamander | 1916 | Albert Sassoon (as John Sainpolis) | Movie |
| The Yellow Passport | 1916 | Fedia (as John Sainpolis) | Movie |
