Subdivisions of the Duchy of Warsaw

Subdivisions of the Duchy of Warsaw were based on departments that were headed by prefects.

The subsidivions were based on the French model following the erection of the Duchy of Warsaw by Napoleon.

The departments were in turn subdivided into traditional Polish powiats (counties).

After the 1809 Polish–Austrian War, and the Treaty of Schönbrunn, their number increased to ten (as the Duchy territory was expanded following the annexation of West Galicia).

Main cities of the Duchy (Warsaw, Poznan, Kalisz, Torun, Lublin, Kraków and Sandomierz) were administered by mayors (Polish: prezydent), who were nominated by King Frederick Augustus I.