Siedlce Department
Appearance
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Podzial_Ks_Warszawskiego_na_departamenty.png/200px-Podzial_Ks_Warszawskiego_na_departamenty.png)
Siedlce Department (Polish: Departament siedlecki) was a unit of administrative division and local government in Polish Duchy of Warsaw in years 1809–1815.
Its capital city was Siedlce, and it was further divided onto 9 powiats.
In 1815 it was transformed into Podlasie Voivodeship.