| Jack Duffy | |
| Birth Date: | 4 September 1882 |
| Birth Place: | Pawtucket, Rhode Island, United States |
| Death Place: | Hollywood, California, United States |
| Occupation: | Actor |
| Yearsactive: | 1916-1937 |
Jack Duffy (September 4, 1882 – July 23, 1939) was an American film actor. He appeared in more than 80 films between 1916 and 1937, usually looking older than his age with his make-up. He acted in a series of silent shorts for the Christie Film Company, a pioneering movie studio that specialized in producing situational comedies, but also appeared in some Buster Keaton comedies. When his acting career declined in the early 1930s, he continued to work in his dual capacity of make-up artist. Duffy was born in Pawtucket, Rhode Island, and died in Hollywood, California. His sister was actress Kate Price.
| Year | Title | Role | Notes | |
|---|---|---|---|---|
| 1916 | The Adventures of Peg o' the Ring | |||
| 1918 | A Dog's Life | Man in Dance Hall | Short, Uncredited | |
| 1919 | Blackie's Redemption | The Dove | ||
| 1919 | Lord and Lady Algy | Minor Role | ||
| 1920 | The Backyard | Short | ||
| 1920 | Neighbors | The Judge | Short | |
| 1923 | Our Hospitality | Sam Gardner | Uncredited | |
| 1924 | Reckless Romance | Grandpa | ||
| 1924 | The Brass Bowl | O'Hagan | ||
| 1925 | Stop Flirting | Joseph - the Butler | ||
| 1925 | Madame Behave | M.T. House | ||
| 1926 | Ella Cinders | Fire Chief | ||
| 1927 | No Control | Noah Flood | ||
| 1928 | Harold Teen | Grandpop Teen | ||
| 1928 | Hot Scotch | Sandy MacDuff | Short | |
| 1929 | Divorce Made Easy | Uncle Todd | ||
| 1929 | Sally | Roue | ||
| 1932 | Love in High Gear | Hotel Proprietor | ||
| 1933 | Alice in Wonderland | Leg of Mutton | Uncredited | |
| 1935 | Texas Terror | Jake Abernathy | ||
| 1935 | George White's 1935 Scandals | Bearded Man | Uncredited | |
| 1935 | Welcome Home | Rube | Uncredited | |
| 1935 | Trails End | Deke | ||
| 1935 | Here Comes Cookie | Wilbur | Uncredited | |
| 1935 | Keystone Hotel | Man with Ear Trumpet | Short, Uncredited | |
| 1935 | She Couldn't Take It | Farmer | Uncredited | |
| 1936 | Wild Brian Kent | Old-Time Fireman | ||
| 1937 | The Gold Racket | Hinkle | ||
| 1937 | Love Takes Flight | Bartender |