Grewingk Glacier is a 13-mile-long glacier located in the Kenai Mountains, near Kachemak Bay, in the U.S. state of Alaska. It begins at and trends northwest to, 15 miles east-southeast of Homer.It was named in 1880 by W. H. Dall of the U.S. Coast and Geodetic Survey for the Baltic German geologist Constantin Grewingk.