Kreis Rosenberg in Westpreußen

The district included Bischofswerder, Deutsch Eylau, Freystadt, Riesenburg and Rosenberg.

With the entry into force of the Treaty of Versailles on 10 January 1920, the establishment of the Polish Corridor on West Prussian territory and the associated dissolution of the Province of West Prussia, the district was temporarily subordinated to the Oberpräsident in Königsberg.

In preparation for the referendum on 1 July 1920 about the future membership of the district, the district area was subordinated to the Inter-Allied Commission for Government and Referendum in Marienwerder until 16 August 1920.

After the Invasion of Poland in 1939, the district of Rosenberg became part of the newly formed Reichsgau Danzig-West Prussia.

In January 1945 the Red Army conquered the district and in March 1945 it was placed under the administration of the Polish People's Republic.