Nizki Island (Avayax̂ in Aleut) is an uninhabited island in the Aleutian Islands in the U.S. state of Alaska. Located at (52°44′28″N173°59′08″E), it is the middle island of the Semichi Islands group of the Near Islands. Flanked by Shemya to the east and Alaid to the west, three-mile-long (5 km) Nizki is periodically joined to Alaid by a sand spit. The name is said to derive from the Russian nizkiy, meaning "low," a term descriptive of the island's topography, with a maximum elevation of 165 feet.