Ortenburg may refer to:

• Ortenburg (Bavaria), a market town in Bavaria, Germany
• Ortenburg-Neuortenburg, state of the Holy Roman Empire
• Grafschaft Ortenburg, comital dynasty in the Duchy of Carinthia
• Burgruine Ortenburg, castle ruin in Carinthia, Austria
• Château de l'Ortenbourg, castle ruin in Alsace, France

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