List of directors of the Physics Institute and the I. Physics Institute of the Giessen University
The following people were directors of the Physics Institute of Giessen University or, after the establishment of other institutes, directors of the I. Physics Institute of Justus Liebig University in Giessen .
| Surname | Taking office |
| Johann Heinrich Buff | 1838 |
| Wilhelm Conrad Röntgen | 1879 |
| Franz Himstedt | 1889 |
| Otto Wiener | 1895 |
| Wilhelm Vienna | 1899 |
| Paul Drude | 1900 |
| Walter König | 1905 |
| Walther Bothe | 1930 |
| Christian Gerthsen | 1932 |
| Wilhelm Hanle | 1941 |
| Arthur Scharmann | 1969 |
| Bruno K. Meyer | 1996 |
| Martin Eickhoff | 2015 |
| Peter J. Sure | 2016 |