Zielonka [ʑeˈlɔnka] is a town in Wołomin County, Masovian Voivodeship, Poland, with 17,398 inhabitants (2013). It is located about 13 km to the north-east of the centre of Warsaw. City rights since 1960.
3 primary schools
a junior high school
a high school
2 Roman Catholic churches
a sports centre
2 railway stations
a large proving ground which occupies about 2/3 of the municipality area
Senior citizen house in Zielonka
4 clay pits
2 nature reserves
86 trees registered as natural monuments
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Coordinates: 52°18′03″N 21°09′31″E / 52.30083°N 21.15861°E