Ropsha is a settlement in Lomonosovsky District of Leningrad Oblast, Russia, situated about 20 kilometres (12 mi) south of Peterhof and 49 kilometres (30 mi) south-west of central Saint Petersburg, at an elevation of 80 metres (260 ft) to 130 metres (430 ft). The palace and park ensemble of Ropsha are included in the UNESCO World Heritage list as a constituent of Historic Centre of Saint Petersburg and Related Groups of Monuments.

Lomonosovsky District 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. Population: 70,245 (2010 Russian census); 65,297 ; 66,104 (1989 Soviet census).