Wilhelm Heinrich Immanuel Bleek (8 March 1827 – 17 August 1875) was a German linguist.
His work included A Comparative Grammar of South African Languages and his great project jointly executed with Lucy Lloyd: The Bleek and Lloyd Archive of |xam and !kun texts.
A short form of this eventually reached press with Specimens of Bushman Folklore, which Laurens van der Post drew on heavily.