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 Oldenburg (F263), a German corvette commissioned in 2013
- MS Oldenburg, a British passenger ferry
- SMS Möwe (1914) or Oldenburg, a German cargo ship and auxiliary cruiser
- SMS Oldenburg, a World War I battleship
- SMS Oldenburg (1884), a German armored coastal defense ship
- SS Oldenburg (1936), a German cargo ship and auxiliary cruiser
- Suomen Joutsen or Oldenburg, a full-rigged ship
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
See also
- Duchess of Oldenburg (apple), a Russian apple cultivar also known as Oldenburg
- Geheimrat Dr. Oldenburg, a German apple cultivar also known as Oldenburg
- Oldenberg, a surname
- Oldenburg Baby, an aborted child who survived