| Mary Ryan, Detective | |
| Director: | Abby Berlin |
| Producer: | Rudolph Flothow |
| Screenplay: | George Bricker |
| Story: | Harry Fried |
| Starring: | Marsha Hunt John Litel June Vincent |
| Music: | Mischa Bakaleinikoff |
| Cinematography: | Vincent Farrar |
| Editing: | James Sweeney |
| Color Process: | Black and white |
| Studio: | Columbia Pictures |
| Runtime: | 68 minutes |
| Country: | United States |
| Language: | English |
Mary Ryan, Detective is a 1949 American crime drama, directed by Abby Berlin, which stars Marsha Hunt, John Litel, and June Vincent.