| Bob Harmon | |
| Position: | Pitcher |
| Bats: | Both |
| Throws: | Right |
| Birth Date: | 15 October 1887 |
| Birth Place: | Liberal, Missouri, U.S. |
| Death Place: | Monroe, Louisiana, U.S. |
| Debutleague: | MLB |
| Debutdate: | June 23 |
| Debutyear: | 1909 |
| Debutteam: | St. Louis Cardinals |
| Finalleague: | MLB |
| Finaldate: | June 28 |
| Finalyear: | 1918 |
| Finalteam: | Pittsburgh Pirates |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 107–133 |
| Stat2label: | Earned run average |
| Stat2value: | 3.33 |
| Stat3label: | Strikeouts |
| Stat3value: | 634 |
| Teams: |
|
Robert Green Harmon (October 15, 1887 – November 27, 1961) was an American Major League Baseball pitcher. He played nine seasons in the majors, between 1909 and 1918, for the St. Louis Cardinals and Pittsburgh Pirates.