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.

It was created on 1 January 1999 out of the former Warsaw, Plock, Ciechanow, Ostroleka, Siedlce and Radom voivodships as a result of Local Government Reorganization Act of 1998. The voivodship's name recalls the region's traditional name of Mazovia (Mazowsze) with which it more or less corresponds.

Administrative division

42 counties (4 city counties + 38 land counties), and 325 communes (including 85 urban communes or cities).

  • Ostrołęka City County (Ostrołeka - miasto na prawach powiatu)
  • Płock City County (Płock - miasto na prawach powiatu)
  • Radom City County (Radom - miasto na prawach powiatu)
  • Siedlce City County (Siedlce - miasto na prawach powiatu)

  • Bialobrzegi County, powiat białobrzeski, Bialobrzegi
  • Ciechanow County, powiat ciechanowski, Ciechanow
  • Garwolin County, powiat garwoliński, Garwolin
  • Gostynin County, powiat gostyniński, Gostynin
  • Grodzisk Mazowiecki County, powiat grodziski (mazowiecki), Grodzisk Mazowiecki
  • Grojec County, powiat grójecki, Grojec
  • Kozienice County, powiat kozienicki, Kozienice
  • Legionowo County, powiat legionowski, Legionowo
  • Lisko County, powiat lipski, Lisko
  • Losice County, powiat łosicki, Losice
  • Makow County, powiat makowski, Makow
  • Minsk Mazowiecki County, powiat miński, Minsk Mazowiecki
  • Mlawa County, powiat mławski, Mlawa
  • Nowy Dwor Mazowiecki County, powiat nowodworski (mazowiecki), Nowy Dwor Mazowiecki
  • Ostroleka County, powiat ostrołęcki, Ostroleka
  • Ostrow Mazowiecka County, powiat ostrowski (mazowiecki), Ostrow Mazowiecka
  • Otwock County, powiat otwocki, Otwock
  • Piaseczno County, powiat piaseczyński, Piaseczno
  • Plock County, powiat płocki, Plock
  • Plonsk County, powiat płoński, Plonsk
  • Pruszkow County, powiat pruszkowski, Pruszkow
  • Przasnysz County, powiat przasnyski, Przasnysz
  • Przysucha County, powiat przysuski, Przysucha
  • Pultusk County, powiat pułtuski, Pultusk
  • Radom County, powiat radomski, Radom
  • Siedlce County, powiat siedlecki, Siedlce
  • Sierpc County, powiat sierpecki, Sierpc
  • Sochaczew County, powiat sochaczewski, Sochaczew
  • Sokolow Podlaski County, powiat sokołowski, Sokolow Podlaski
  • Szydlowiec County, powiat szydłowiecki, Szydlowiec
  • Warszawa County, powiat warszawski, Warsaw
  • Warszawa-West County, powiat warszawski zachodni, Warsaw
  • Wegrow County, powiat węgrowski, Wegrow
  • Wolomin County, powiat wołomiński, Wolomin
  • Wyszkow County, powiat wyszkowski, Wyszkow
  • Zwolen County, powiat zwoleński, Zwolen
  • Zuromin County, powiat żuromiński, Zuromin
  • Zyrardow County, powiat żyrardowski, Zyrardow

Major cities and towns

(population in 2003):


Voivodships of Poland:
Greater Poland Voivodship  |  Kuyavian-Pomeranian Voivodship  |  Lesser Poland Voivodship  |  Lodz Voivodship  |  Lower Silesian Voivodship  |  Lublin Voivodship  |  Lubusz Voivodship  |  Masovian Voivodship  |  Opole Voivodship  |  Subcarpathian Voivodship  |  Podlasie Voivodship  |  Pomeranian Voivodship  |  Swietokrzyskie Voivodship  |  Silesian Voivodship  |  Warmian-Masurian Voivodship  |  West Pomeranian Voivodship