Leopold von Pebal (29 December 1826 – 17 February 1887) was an Austrian chemist.

In 1851 he obtained his PhD at the University of Graz, followed by several years working as an assistant at the Joanneum.

Afterwards, he continued his education at Heidelberg, where he studied with Robert Bunsen (1811–1899) and Gustav Kirchhoff (1824–1887).

Pebal was murdered by an employee of the university in front of his laboratory, where he died shortly after the attack.

His wide-ranging research included studies involving the composition of stearic and citric acid.