Ust-Kamchatsky District (Russian: Усть-Камча́тский райо́н) is an administrative and municipal district (raion) of Kamchatka Krai, Russia, one of the eleven in the krai. It is located in the east of the krai. The area of the district is 40,837 square kilometers (15,767 sq mi). Its administrative center is the rural locality (a settlement) of Ust-Kamchatsk. Population: 11,744 (2010 Russian census); 15,084 (2002 Census); 28,867 (1989 Soviet census). The population of Ust-Kamchatsk accounts for 37.1% of the district's total population.