Margaret Oldenburg may refer to:

• Margaret of Denmark, Queen of Scotland (1456–1486), daughter of King Christian I of Denmark and the wife of King James III of Scotland
• Princess Margaret of Denmark (1895–1992), granddaughter of King Christian IX of Denmark and the wife of Prince René of Bourbon-Parma
• Princess Margarita of Greece and Denmark (1905–1981), eldest child and daughter of Prince Andrew of Greece and Denmark and Princess Alice of Battenberg

This disambiguation page lists articles associated with the title Margaret Oldenburg.
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