Klyuchi is a rural locality in Ust-Kamchatsky District of Kamchatka Krai, Russia, located on the Kamchatka River, 30 kilometers (19 mi) to the north of Klyuchevskaya Sopka volcano. It had a population of 5,726 (2010 census); a marked decrease from that of 7,073 (2002 census); the population at its peak numbered 11,251 (1989 Soviet census).