Karl Bogislaus Reichert (December 20, 1811 – December 21, 1883) was a German anatomist.
Reichert was born in Rastenburg (Kętrzyn), East Prussia. He studied etiology and histology in Königsberg. He was a student of Friedrich Schlemm and Johannes Peter Müller at the Friedrich-Wilhelm-Institute and at the Charité in Berlin, receiving his doctorate in 1836. Reichert taught at the universities of Dorpat (since 1843), Breslau (since 1853), and Berlin (since 1858), where he died.
Reichert is remembered for his work in embryology, his pioneer research in cell theory, and his anatomical studies of the brain and inner ear. With Ernst Gaupp he was co-architect of the Reichert–Gaupp theory concerning the origin of mammalian ossicles of the ear. His name is lent to the eponymous Reichert's cartilage, which is a cartilage in the mesenchyme of the second branchial arch in the embryo from which develop the styloid processes, the stylohyoid ligaments, and the lesser cornu of the hyoid bone.