Piastów [ˈpʲastuf] is a town in central Poland, near Warsaw, with 23,331 inhabitants (2006 est). It is situated in the Masovian Voivodship (since 1999); previously, it was in Warszawa Voivodship (1975–1998). With 3963 persons/km², it is the second most densely populated township in Poland (after Świętochłowice).

Piastów
Black Madonna of Częstochowa Church
Coat of arms of Piastów
Piastów is located in Poland
Piastów
Piastów
Coordinates: 52°11′N 20°51′E / 52.183°N 20.850°E / 52.183; 20.850Coordinates: 52°11′N 20°51′E / 52.183°N 20.850°E / 52.183; 20.850
Country Poland
VoivodeshipMasovian
CountyPruszków
GminaPiastów (urban gmina)
Established16th century as Żdżary
Town rights1952
Government
 • MayorGrzegorz Waldemar Szuplewski
Area
 • City5.83 km2 (2.25 sq mi)
 • Urban
5.76 km2 (2.22 sq mi)
Population
 (2014)
 • City22,826
 • Density3,900/km2 (10,000/sq mi)
 • Urban
22,826
 • Urban density4,050.5/km2 (10,491/sq mi)
Time zoneUTC+1 (CET)
 • Summer (DST)UTC+2 (CEST)
Postal code
05-820
Area code+48 22
Car platesWPR
Websitehttp://piastow.pl/

In the Middle Age, the villages of Żdżary and Utrata existed in the place of today's' Piastów. Piastów is served by Piastów railway station.