The district of Oststernberg () existed in the Prussian Province of Brandenburg in Germany from 1873 to 1945. Today, the former territory of the district is part of the Sulęcin County of the Lubusz Voivodeship in Poland. The district included the four towns of Königswalde, Sonnenburg, Sternberg (Neumark) and Zielenzig.

History The district was created in 1873 when the Sternberg district was split into the Oststernberg and Weststernberg districts. The district office of the new Oststernberg district was in the town of Zielenzig.

In the spring of 1945, the district was occupied by the Soviet Red Army. After the end of the war, the district was placed under Polish administration. The local German population was expelled shortly thereafter and the influx of Polish and Ukrainian migrants began, some of whom came from areas east of the Curzon Line that had fallen to the Soviet Union.

Population YearPopulationSource187148,476189050,449190047,910191044,238192543,890193341,963193940,595

Municipalities At the end of its existence in 1945, the district comprised four towns and 73 other municipalities:

Albrechtsbruch Alt Limmritz Arensdorf Beatenwalde Beaulieu Breesen Brenkenhofsfleiß Burschen Ceylon Dammbusch Freiberg Gartow Glauschdorf Gleißen Grabow Grochow Groß Friedrich Grunow b. Wutschdorf Hammer Hampshire Heinersdorf Herzogswalde Jamaika Kemnath Költschen Königswalde, town Koritten Korsika Kriescht Lagow Langenfeld Langenpfuhl Louisa Malkendorf Malsow Malta Mauskow Meekow Neu Dresden Neu Lagow Neu Limmritz Neudorf Neuwalde Ögnitz Osterwalde Ostrow Pensylvanien Petersdorf Priebrow Rauden Reichen Reitzenstein Sankt Johannes Saratoga Schartowsthal Scheiblersburg Schermeisel Schönow Schönwalde Schwarzsee Seeren Selchow Sonnenburg, town Sophienwalde Spiegelberg Sternberg Nm., town Streitwalde Stuttgardt Sumatra Tauerzig Tempel Trebow Waldowstrenk Wallwitz Wandern Woxfelde Zielenzig, town

References