Karl Grobben (August 27, 1854, Brno – April 13, 1945, Salzburg) was an Austrian biologist. He graduated from, and later worked at, the University of Vienna, chiefly on molluscs and crustaceans. He was also the editor of a new edition of Carl Friedrich Wilhelm Claus' Lehrbuch der Zoologie, and the coiner of the terms protostome and deuterostome.
Taxa named by Grobben include:
Taxa named in Grobben's honour include: