Vilyuchinsk is a closed town in Kamchatka Krai, Russia, located on the Kamchatka Peninsula about across Avacha Bay from Petropavlovsk-Kamchatsky. Population:

It was founded as Sovetsky on October 16, 1968 through the amalgamation of three earlier settlements which supplied the Soviet Navy and served as a base for submarine construction: Rybachy, Primorsky, and Seldevaya. In 1970, as with other closed towns in the Soviet Union, it was given a code name based on the nearest major city, becoming known officially as Petropavlovsk-Kamchatsky-50 until 1994. In 1994, the town was renamed after the nearby volcano, Vilyuchik.