Grewingk Glacier is a 13-mile-long (21 km) glacier located in the Kenai Mountains, near Kachemak Bay, in the U.S. state of Alaska. It begins at 59°34′51″N 150°57′01″W / 59.58083°N 150.95028°W and trends northwest to 59°36′11″N 151°07′39″W / 59.60306°N 151.12750°W, 15 miles (24 km) 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 .