From the Wikipedia page 
Priozersky District (Russian: Приозе́рский райо́н) is an administrative and municipal district (raion), one of the seventeen in Leningrad Oblast, Russia. It is located in the northwest of the oblast and borders with Lakhdenpokhsky District of the Republic of Karelia in the north, Vsevolozhsky District in the south, and Vyborgsky District in the west. In the east, the district is bounded by Lake Ladoga. The area of the district is 3,597.5 square kilometers (1,389.0 sq mi). Its administrative center is the town of Priozersk.