| Franz Klein | |
| Birth Date: | 24 April 1854 |
| Birth Place: | Vienna, Austria |
| Death Date: | 6 April 1926 |
| Office1: | Minister of Justice of Austria-Hungary |
| Term Start1: | 1906 |
| Term End1: | 1908 |
| Office2: | Minister of Justice of Austria-Hungary |
| Term Start2: | November 1916 |
| Term End2: | December 1916 |
| Occupation: | Jurist, politician |
| Alma Mater: | University of Vienna |
Franz Klein (24 April 1854 – 6 April 1926) was an Austrian jurist and politician, who served as Minister of Justice towards the end of the Austro-Hungarian Empire.
Born in Vienna, Klein studied and later taught law there, achieving habilitation in the law of civil procedure and Roman law in 1891. His essay Pro Futuro, in which he called for civil procedure reform, led to his appointment as an official with the Ministry of Justice, where he drafted the Austrian code of civil procedure, among several other laws. He helped strengthen the investigative authority and responsibility of the judge to the benefit of the weaker party, moving civil procedure towards a more inquisitorial system.
In 1905, Klein was appointed to the House of Lords. He served as Minister of Justice between 1906 and 1908, and again from November to December in 1916. He was a member of the Austrian observer delegation to the negotiations about the 1919 treaty of Saint-Germain-en-Laye. After the fall of the monarchy, he failed to gain reelection to Parliament.