Franz Eugen Geinitz (15 February 1854, Dresden – 9 March 1925, Rostock) was a German geologist and mineralogist best known for his geological studies of the Mecklenburg region.
He was the son of geologist Hanns Bruno Geinitz.
In 1876 he obtained his PhD from the University of Leipzig with a dissertation on mineral pseudomorphs.
In 1881 he became a full professor and director of the mineralogical-geological institute at Rostock.
[1] In 1882 he was named head of the Mecklenburg Geological Landesmuseum.