Peter of Oldenburg

Peter of Oldenburg may refer to:


 * Peter I, Grand Duke of Oldenburg (1755–1829), Regent of the Duchy of Oldenburg
 * Peter II, Grand Duke of Oldenburg (1827–1900), Grand Duke of Oldenburg
 * Duke Peter Georgievich of Oldenburg (1812–81), Duke of the House of Oldenburg
 * Duke Peter Alexandrovich of Oldenburg (1868–1924), first husband of Grand Duchess Olga Alexandrovna of Russia
 * Peter Friedrich Wilhelm, Duke of Oldenburg (1754–1823), Duke of Oldenburg