Friedrich Karl Georg Fedde (30 June 1873, Breslau (now Wrocław) – 14 March 1942, Berlin-Dahlem) was a German botanist.
Fedde studied natural sciences, commencing in 1892 and graduating in 1896 in Breslau.
He was a teacher in schools of higher learning in Breslau, Tarnowitz and Berlin.
Fedde's main work dealt with plant systematics and biogeography.
His renown rests mainly on the publication of the Repertorium Specierum Novarum Regni Vegetabilis and its Beihefte for longer monographs.