Hubert Leitgeb (13 October 1835 – 5 April 1888) was an Austrian botanist born in Portendorf, a village in Carinthia.
In 1867 he obtained his habilitation, followed by an associate professorship at Graz during the following year.
In 1869 he became a full professor at the University of Graz, where in 1873, he was appointed director of the botanical garden.
His wide-ranging research included studies on the embryology and developmental biology of ferns, and investigations involving the physiology of a plants' stomatal apparatus, to name a couple.
Among his written efforts was a six-part treatise on liverworts, titled Untersuchungen ueber die Lebermoose.