Lomonosovsky District (Russian: Ломоно́совский райо́н) is an administrative and municipal district (raion), one of the seventeen in Leningrad Oblast, Russia. It is located in the west of the oblast and borders with Petrodvortsovy and Krasnoselsky Districts of the Federal city of Saint Petersburg in the east, Gatchinsky District in the southeast, Volosovsky District in the south, Kingiseppsky District in the southwest, and the city of oblast significance of Sosnovy Bor in the west. In the north, the district is bounded by the Gulf of Finland. The area of the district is 1,919 square kilometers (741 sq mi). Its administrative center is the town of Lomonosov (which is not a part of Leningrad Oblast and is located on the territory of the federal city of Saint Petersburg). Population: 70,245 (2