Poznań Department (Polish: Departament Poznański) was a unit of administrative division and local government in Polish Duchy of Warsaw in years 1806-1815.
Capital city: Poznań
Administrative division: 10 counties.
{{Historical divisions of Greater Poland}}{{coord missing|Masovian Voivodeship}}{{DEFAULTSORT:Poznan Department}}
4 : Departments of the Duchy of Warsaw|History of Poznań|States and territories established in 1806|States and territories disestablished in 1815