| Birth Date: | 11 January 1888 |
| Birth Place: | Brooklyn, New York |
| Death Place: | Santa Monica, California |
| Occupation: | Film actor |
Jay Belasco (January 11, 1888 May 1, 1949), born Reginald James Belasco, was an American film actor whose career mostly involved silent film. Belasco was born in Brooklyn, New York, and was a cousin of actors Walter Belasco and David Belasco. He died from a heart attack on May 1, 1949, in Santa Monica, California.
| Year | Title | Role | Notes/refs |
|---|---|---|---|
| 1915 | Lord John in New York | Antonio Tostini | |
| Lord John's Journal | Paolo Tostini | 5-film series[1] | |
| The Little Upstart | Paul Newell | Short | |
| 1916 | Across the Line | Horton Manners Jr. | Short |
| The Phantom Island | Robert Law | Short | |
| The Grip of Jealousy | Harry Grant | ||
| Tangled Hearts | Ernest Courtney | ||
| The Gilded Spider | Paul Winston | ||
| Bobbie of the Ballet | Jack Stimson | ||
| The Grasp of Greed | Eustace | ||
| The Belle and the Bell Hop | Salden | Short | |
| The Caravan | Chons | Short | |
| His Baby | Minor Role | Short, Uncredited | |
| Through Solid Walls | Dick | Short | |
| The Fascinating Model | Jay | Short | |
| The Price of Silence | Billy Cupps | ||
| 1917 | How to Be Happy Though Married | Ernest | Short |
| The Last Cigarette | Carson Huntley | Short | |
| Perils of the Secret Service | |||
| The Clash of Steel | Short | ||
| The Dreaded Tube | Short | ||
| David's Idle Dream | David | Short | |
| The Crimson Blade | Carson Huntley | Short | |
| The Man in the Trunk | Short | ||
| Clothes and the Man | Short | ||
| Twice in the Same Place | Short | ||
| Her Hero | Short | ||
| The Signet Ring | Carson Huntley | Short | |
| When Mary Took the Count | Short | ||
| The Pace That Kills | The Other Man | Short | |
| The International Spy | Carson Huntley | Short | |
| And in Walked Uncle | Short | ||
| Her Wayward Parents | Billy Harrison | Short | |
| Kleptomaniacs | Short | ||
| The Great American Game | Short | ||
| Fat and Foolish | The Dude | Short | |
| Trixie of the Follies | Jack | Short | |
| Two of a Kind | Short | ||
| Bluffing Father | Short | ||
| A Two-Cylinder Courtship | Jack | Short | |
| Lorelei of the Sea | Dorian | ||
| The Master Spy | Carson Huntley | Short | |
| Green Eyes and Bullets | Short | ||
| Hearts and Clubs | Short | ||
| Betty's Big Idea | Short | ||
| Love and Locksmiths | Short | ||
| Mary's Merry Mix-Up | Jack - Mary's Husband | Short | |
| More Haste, Less Speed | Short | ||
| A Maid to Order | Short | ||
| Stepping Out | Short | ||
| Nearly a Papa | Jack Gordon | Short | |
| Their Seaside Tangle | Short | ||
| Mary's Boomerang | Short | ||
| Thirty Days | Mr. Newlywed | Short | |
| 1918 | Their Honeymoon Baby | Short | |
| War Gardens | Short | ||
| Her Awful Fix | Short | ||
| Know Your Neighbor | Short | ||
| Are Second Marriages Happy? | Short | ||
| Three X Gordon | Walter | ||
| 1919 | Life's a Funny Proposition | Herbert Austin | |
| Hard Luck | Short | ||
| Stop, Look and Listen | Short | ||
| Tell Your Wife Everything | Short | ||
| A Cheerful Liar | Short | ||
| Lobster Dressing | Short | ||
| A Flirt There Was | Short | ||
| 1920 | Smoldering Embers | Jack Manners | |
| Jenny Be Good | Royal Renshaw | ||
| Dollar for Dollar | Teddy Mordant | ||
| Help Wanted - Male | Lieutenant | ||
| The Palace of Darkened Windows | Billy Hill | ||
| 1921 | In for Life | Short | |
| Say Uncle | Short | ||
| 1922 | One Stormy Knight | Short | |
| 1924 | Dandy Lions | Short | |
| Nerve Tonic | Eddie's Rival | Short | |
| Hold Your Breath | Another Customer | ||
| Tootsie Wootsie | Short | ||
| Bright Lights | Short | ||
| 1927 | The Wrong Mr. Wright | ||
| 1931 | Not So Loud | ||
| 1933 | The Woman Accused | Tony Graham | |
| 1934 | Miss Fane's Baby Is Stolen | Friend of Miss Fane | Uncredited |
| 1935 | The Gilded Lily | London Cafe Patron | Uncredited |
| The Wedding Night | Party Guest | Uncredited | |
| The Four-Star Boarder | Officer | Short, Uncredited | |
| Bonnie Scotland | Officer | Uncredited | |
| 1936 | The Milky Way | Man in car | Uncredited |
| Love Before Breakfast | Minor Role | Uncredited | |
| Our Relations | Denker's Beer Garden / Nightclub Customer | Uncredited | |
| 1941 | Szeressük egymást | ||
| Footlight Fever | Costumer | Uncredited, (final film role) |