Masovian Voivodeship or Mazovia Province ( ), is the largest and most populous of the sixteen Polish provinces, or voivodeships, created in 1999. It occupies of east-central Poland, and has 5,324,500 inhabitants. Its principal cities are Warsaw (1.729 million) in the centre of the Warsaw metropolitan area, Radom (226,000) in the south, Plock (127,000) in the west, Siedlce (77,000) in the east, and Ostroleka (55,000) in the north. The capital of the voivodeship is the national capital, Warsaw.