Łomża Department (Polish: ''Departament Łomzyński'') was an administrative division and local government in the Polish

Duchy of Warsaw The Duchy of Warsaw (; ; ), also known as the Grand Duchy of Warsaw and Napoleonic Poland, was a First French Empire, French client state established by Napoleon Bonaparte in 1807, during the Napoleonic Wars. It initially comprised the ethnical ...

in the years 1807–15. The department comprised 10 counties and had its capital at

Łomża Łomża () is a city in north-eastern Poland, approximately to the north-east of Warsaw and west of Białystok. It is situated alongside the Narew river as part of the Podlaskie Voivodeship. It is the capital of Łomża County and has been the se ...

. From January to July 1807 the department was known as the Białystok Department (''Departament Białostocki''), with its capital at

Białystok Białystok is the largest city in northeastern Poland and the capital of the Podlaskie Voivodeship. It is the List of cities and towns in Poland, tenth-largest city in Poland, second in terms of population density, and thirteenth in area. Biał ...

. However, after the Treaties of Tilsit, the

Russian Empire The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about , roughl ...

agreed to the creation of the

; but in exchange the department ceded four

counties A county () is a geographic region of a country used for administrative or other purposesL. Brookes (ed.) '' Chambers Dictionary''. Edinburgh: Chambers Harrap Publishers Ltd, 2005. in some nations. The term is derived from the Old French denoti ...

: Białostocki, Bielski, Sokólski, and Drohicki. Thus the department's capital had to be moved, and its name was accordingly changed to that of the new capital,

. After 1815 most of the Łomża Department's territory became part of Augustów Province. In 1867 it was reconstituted as the Łomża Governorate.

Administrative divisions

It was divided into 7 counties: * Biebrza County (seat in Szczuczyn) * Dąbrowa County (seat in

Lipsk Lipsk (also ) is a town in Augustów County, Podlaskie Voivodeship, in north-eastern Poland, with 2,520 inhabitants (2004). History Lipsk was granted town rights in 1580 by King Stephen Báthory by virtue of a privilege (law), privilege issued ...

, later in

Augustów Augustów is a town in north-eastern Poland. It lies on the Netta River and the Augustów Canal. It is the seat of Augustów County and of Gmina Augustów in the Podlaskie Voivodeship. Augustów has an area of , and as of June 2022 it has a popul ...

) * Kalvarija County * Łomża County * Marijampolė County * Tykocin County * Wigry-Sejny County (seat in Sejny)

References

Dokumenty urzędowe dotyczące Łomży w okresie Księstwa Warszawskiego z 17 XII 1810 roku, 1 VI 1812 roku, 27 VII 1812 roku
Skarby Dziedzictwa Narodowego, Polska.pl 1807 establishments in Poland Departments of the Duchy of Warsaw Łomża {{Poland-hist-stub