Emil Friedrich Knoblauch (2 December 1864, Groß Karnitten in Kreis Mohrungen – 10 February 1936) was a German botanist.
He studied at the University of Königsberg, obtaining his PhD in 1888.
Later, he was associated with the botanical garden and museum in Göttingen.He identified numerous species within the family Oleaceae, and was the taxonomic authority of the genera Leuranthus and Noldeanthus.