Ortenburg

Ortenburg may refer to:
 * Ortenburg, Bavaria, a market town in Bavaria, Germany
 * Ortenburg-Neuortenburg, state of the Holy Roman Empire
 * Counts of Ortenburg, comital dynasty in the Duchy of Carinthia
 * Burgruine Ortenburg, castle ruin in Carinthia, Austria
 * Château de l'Ortenbourg, castle ruin in Alsace, France