Eduard Fenzl (1808, Krummnußbaum – 1879, Vienna) was an Austrian botanist.
An obituary notes "[h]e was Professor of Botany and Director of the Imperial Botanical Cabinet, a member of the Vienna Academy of Sciences, and Vice-President of the Vienna Horticultural Society."
Fenzl made contributions towards Karl Friedrich Philipp von Martius's Flora Brasiliensis and to Stephan Endlicher's Enumeratio plantarum quas in Novae Hollandiae, etc. He was the author of Pugillus plantarum novarum Syriæ et Tauri occidentalis primus (1842).
The plant genus is named in his honor.