| Friedrich Otto Rudolf Sturm | |
| Birth Date: | 6 January 1841 |
| Birth Place: | Breslau, Prussia |
| Death Place: | Breslau, Germany |
| Nationality: | German |
| Fields: | Mathematics |
| Workplaces: | University of Breslau |
| Alma Mater: | University of Breslau |
| Doctoral Advisor: | Heinrich Schröter |
| Doctoral Students: | Otto Toeplitz |
Friedrich Otto Rudolf Sturm (6 January 1841 – 12 April 1919) was a German mathematician. His Ph.D. advisor was Heinrich Eduard Schroeter, and Otto Toeplitz was one of his Ph.D. students. His best ever proposal type claim is commonly known as "Sturm's Theorem" based on finding the complex imaginary roots of an infinite arbitrary-integer series.