USS Grunion (SS-216) was a Gato-class submarine that sank at Kiska, Alaska, during World War II. She was the only ship of the United States Navy to be named for the grunion.

Kiska is one of the Rat Islands, a group of the Aleutian Islands of Alaska. It is about 22 miles (35 km) long and varies in width from 1.5 to 6 miles. It is part of Aleutian Islands Wilderness and as such, special permission is required to visit it. The island has no permanent population.