Usolsky District is an administrative district (raion) of Perm Krai, Russia; one of the thirty-three in the krai. As a municipal division, it is incorporated as Usolsky Municipal District. It is located in the center of the krai. The area of the district is . Its administrative center is the town of Usolye. Population: The population of Usolye accounts for 40.0% of the district's total population.