Alexander Bittner (16 March 1850 in Friedland – 31 March 1902 in Vienna) was an Austrian paleontologist and geologist.
In 1874-76 he conducted geological research in Italy and Greece, followed by an internship at the Imperial Institute of Geology in Vienna (1877).
In 1897 he was appointed chief geologist of the institute.
[1][2] Bittner is known for his stratigraphic-paleontological research of the eastern Alps, especially studies involving brachiopods from the Alpine Triassic Period.
[1][2] He was among the first scientists to study the effects of the Belluno earthquake that occurred in northern Italy on 29 June 1873.