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″N150°57′01″W) and trends northwest to (59°36′11″N151°07′39″W) 15 miles (24 km) east-southeast of Homer. It was named in 1880 by W. H. Dall of the U.S.