Alexander Georg Supan (3 March 1847 − 7 July 1920) was an Austrian geographer.
Born in Innichen, County of Tyrol, Supan was first educated at the Laibach gymnasium. After studying in Graz, gaining a doctorate in 1870, Supan became a teacher in the Realschule in Laibach. In 1872, he left Laibach and studied geography at Vienna, Dresden and Halle, returning to Laibach in 1877. In 1881, he was appointed professor of geography at the University of Czernowitz, and in 1884 became editor of Petermann's Mitteilungen, retaining this post until 1909, when he accepted the chair of geography at Breslau.
He died in Breslau on 6 July 1920.
This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed (1911). "Alexander Georg Supan". Encyclopædia Britannica (11th ed.). Cambridge University Press. http://www.1911encyclopedia.org/Alexander_Georg_Supan.