Ludwig Graff de Pancsova (2 January 1851 – 6 February 1924), known as Ludwig von Graff, was an Austrian zoologist born in Pancsova.

Ludwig von Graff
Ludwig von Graff
Born	Ludwig Bartholomäus Graff (1851-01-02)January 2, 1851 Pancsova, Austrian Empire
Died	February 6, 1924(1924-02-06) (aged 73) Graz, Austria
Scientific career
Fields	Zoology, Helminthology
Institutions	University of Graz
Author abbrev. (zoology)	Graff; von Graff

In 1871, he received his medical degree in Vienna, afterwards studying zoology at the University of Graz. In 1872, he was an assistant at the zoological institute in Strasbourg, where he worked closely with Eduard Oscar Schmidt (1823–1886). In 1873, he relocated to Munich as an assistant to Karl Theodor Ernst von Siebold (1804–1885), gaining his habilitation during the following year. In 1876, he became a professor at the Academy of Forestry in Aschaffenburg, and from 1884 was a professor of zoology at the University of Graz. Here, he expanded the institute of zoology and its library. In 1896-97, he was rector of the university.

Graff was a leading expert on Turbellaria (flatworms), especially remembered for research of its morphology and biological systematics. He gathered material for his studies on numerous expeditions, which included journeys to Ceylon and Java (1893–94), the Arctic Ocean (1902), and North America (1907).

With Victor von Ebner (1842–1925) and others, he founded the Gesellschaft für Morphologie und Physiologie (1907). He was also a co-founder of the Deutschen Zoologischen Gesellschaft. The 1910 International Congress of Zoologists at Graz elected him an honorary president