The 
Masovian Voivodship (in 
Polish województwo Mazowieckie) is the largest and most populous of the sixteen 
Polish administrative regions or 
voivodships created in 
1999. It covers an area of 35,598 km² in
eastern-central Poland and contains nearly 5.1 million inhabitants. Its principal cities are 
Warsaw (population 1.6 million) in the
centre, 
Radom (230,000) in the south, 
Plock (130,000) in the west, 
Siedlce[?] (75,000) in the east, and 
Ostroleka (55,000) in the north. The province is named for the historical region of 
Masovia with which it more or less corresponds.
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