Oranienbaum (German pronunciation: [oˈʁaːni̯ənˌbaʊ̯m] ) is a former town and a former municipality in the district of Wittenberg, in Saxony-Anhalt, Germany. Since 1 January 2011, it is a District (German: Ortsteil) of the town of Oranienbaum-Wörlitz. It is situated south of the Elbe, east of Dessau.

The former settlement of Nischwitz was renamed in 1673 after Countess Henriette Catherine of Nassau, a scion of the House of Orange-Nassau (Dutch: Oranje-Nassau) and princess consort of the then ruling Prince John George II of Anhalt-Dessau.

From 1683 on, the Countess had the Oranienbaum Palace erected according to plans by the Dutch architect Cornelis Ryckwaert. The parks are today included within the Dessau-Wörlitz Garden Realm, a UNESCO World Heritage Site since 2000.

• Oranienbaum Palace, park and Chinese garden with pagoda
• Baroque parish church, built in 1712
• Monument Path with 29 stations
• Historical market square
• Dutch architectural style of the 19th century

• Daun, Germany

• Oranienburg
• Oranienbaum, Russia

• Municipal site