Oldenburg may also refer to:

Places

• Mount Oldenburg, Ellsworth Land, Antarctica
• Oldenburg (city), an independent city in Lower Saxony, Germany
  • Oldenburg (district), a district historically in Oldenburg Free State and now in Lower Saxony
• Oldenburg in Holstein, a town in Schleswig-Holstein, Germany
  • Oldenburg-Land, an association of municipalities near Oldenburg in Holstein
• Oldenburg, Indiana, a town in the United States
• Oldenburg, Texas, a settlement in the United States

Historical

• Bishopric of Oldenburg (970–1160), a bishopric that became the Prince-bishopric of Lübeck, now in Schleswig--Holstein
• County of Oldenburg (1091–1774), a state of the Holy Roman Empire, now in Lower Saxony
• Duchy of Oldenburg (1774–1810), a state of the Holy Roman Empire
• Grand Duchy of Oldenburg (1814–1918), a state of the German Confederation and Empire
• Free State of Oldenburg (1918–1946), a state of the Weimar Republic and Nazi Germany
• Oldenburg Land, a historical region in Lower Saxony, covering the former free state

Ships

• German corvette Oldernburg (F263), a Braunschweig-class (Type 130) corvette commissioned in 2013
• MS Oldenburg, a British passenger ferry
• SMS Oldenburg, a World War I battleship
• SMS Oldenburg (1884), an armored coastal defense ship of the German Imperial Navy
• SS Möwe (1914) or Oldenburg, a freighter and former auxiliary cruiser
• Suomen Joutsen or Oldenburg, a full-rigged ship
• SS Oldenburg (1936), a Oldenburg Portugiesische Dampschiffs Rhederei cargo ship in service 1936-39

People

• Claes Oldenburg (1929–2022), Swedish-born American sculptor
• Oldenburg (surname)

Other uses

• the Oldenburg or Oldenburger, a horse breed from Lower Saxony
• House of Oldenburg, North German noble family, kings of Denmark
• University of Oldenburg, Oldenburg, Germany