| Frank Donnelly | |
| Position: | Pitcher |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | 7 October 1869 |
| Birth Place: | Tamaroa, Illinois |
| Death Place: | Canton, Illinois |
| Debutleague: | MLB |
| Debutdate: | August 15 |
| Debutyear: | 1893 |
| Debutteam: | Chicago Colts |
| Finalleague: | MLB |
| Finaldate: | May 23 |
| Finalyear: | 1894 |
| Finalteam: | Chicago Colts |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 3–1 |
| Stat2label: | Earned run average |
| Stat2value: | 6.36 |
| Stat3label: | Strikeouts |
| Stat3value: | 7 |
| Teams: |
|
Franklin Marion Donnelly (October 7, 1869 – February 3, 1953) was a professional baseball player. He was a right-handed pitcher for parts of two seasons (1893–94) with the Chicago Colts. For his career, he compiled a 3–1 record in 7 appearances, with a 6.36 earned run average and 7 strikeouts.
Donnelly was born in Tamaroa, Illinois and later died in Canton, Illinois at the age of 83.