Rovni Lake is a water reservoir in western Serbia, created by damming the Jablanica river. It is located between the villages of Stubo and Rovni, 15 km (9.3 mi) from the city of Valjevo. The construction of the Stubo-Rovni dam was completed in September 2015. The lake is an integral part of the regional water management system "Rovni" providing water supply for several cities: Valjevo, Lazarevac, Lajkovac, Ub and Mionica.

Valjevo is a city and the administrative center of the Kolubara District in western Serbia. According to the 2022 census, the administrative area of Valjevo had 82,169 inhabitants, 56,145 of whom were urban dwellers.