Masovian Voivodeship (1526–1795)

Masovian Voivodeship (Polish: Województwo Mazowieckie) was an administrative region of the Kingdom of Poland, and of the Polish–Lithuanian Commonwealth, from the 1526 to the partitions of the Polish–Lithuanian Commonwealth (1795). Together with Płock and Rawa Voivodeships, it formed the province of Masovia. Its area was 23,200 km2., divided into ten lands (see ziemia). The seat of the voivode was Warsaw, local sejmiks also convened in Warsaw, at St. Martin's church.

Masovian Voivodeship
Palatinatus Masoviensis
Województwo Mazowieckie
Voivodeship of Poland¹
Coat of arms

The Masovian Voivodeship in
the Polish–Lithuanian Commonwealth in 1635.
23,200 km2 (9,000 sq mi)
October 24 1795
Political subdivisionsTen lands divided into 22 counties
Preceded by
Succeeded by
Duchy of Masovia
New East Prussia
New Galicia
South Prussia
¹ Voivodeship of the Kingdom of Poland. The kingdom was part of the Polish–Lithuanian Commonwealth from 1569.


The voivodeship was officially created by King Sigismund I the Old on December 27, 1529, three years after incorporation of the Duchy of Masovia into the Kingdom of Poland. In the Senate of the Polish–Lithuanian Commonwealth, it had eight senators. These were: the Voivode of Mazovia, the Castellan of Czersk, and Castellans of Wizna, Wyszogród, Zakroczym, Warszawa, Ciechanów, and Liw.

Zygmunt Gloger in his monumental book Historical Geography of the Lands of Old Poland gives a detailed description of Masovian Voivodeship:

"In the general division of the Commonwealth into three provinces: Lesser Poland, Greater Poland, and the Grand Duchy of Lithuania, Mazovia was regarded as part of Province of Greater Poland. This vast land was part of the Kingdom of Poland from the 10th until the 12th century (...) Divided into several smaller parts, it nervertheless remained a separate entity, ruled by one dynasty, with one political, social and legal system. In the years 1462, 1495 and 1526, Mazovian lands were gradually incorporated back into Poland, and divided into three voivodeships – Rawa Mazowiecka, Płock and Mazovia.

In the 16th century, whole Mazovia had the area of 578 sq. miles, and all three Mazovian voivodeships were divided into 33 counties, with 446 Roman-Catholic parishes, 94 towns and 5990 villages. At the same time, Greater Poland proper had the area of 1051 sq. miles, with 6471 villages, while Lesser Poland proper, with the area of 1013 sq. miles, had 5500 villages. As we see, Mazovia, much smaller than Greater and Lesser Poland, had the same number of villages. Per square mile, there were 6 villages in Greater Poland, 5 villages in Lesser Poland, and as many as 10 villages in Mazovia. In Ciechanów County, there were 23 villages per sq. mile, which was the highest number in the whole kingdom (...)

The population of Mazovia would be even higher, if it had not been for the proximity of Podlasie, Rus’, and Lithuania. Since the 14th century, local nobility would settle in those areas in great numbers. Still, Mazovia was among the most densely populated provinces of Poland, together with Łęczyca Land, Kujawy and Dobrzyń Land".

Municipal government

Seat of the Voivodeship Governor (Wojewoda):

Administrative division



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