Zegrze is a village in the administrative district of Gmina Serock, within Legionowo County, Masovian Voivodeship, in east-central Poland. It lies approximately 7 km south-west of Serock, 11 km north-east of Legionowo, and 28 km north of Warsaw. The village gave its name to the nearby Zegrze Reservoir, a man-made lake constructed in 1963, on the lower course of the Narew river, with a hydroelectric complex producing 20 Megawatts of power, a popular place of recreation for the residents of Warsaw. is the location of a historic palace built in 1847 by the noble Krasiński family, given as a dowry of Jadwiga Krasińska in 1862, to her new husband Prince Maciej Radziwiłł. The palace, surrounded by a park, serves as a convention centre and a small hotel.