Amalia of Oldenburg, Queen of Greece (Greek: Αμαλία, Βασίλισσα της Ελλάδος) (21 December 1818 – 20 May 1875) was Queen consort of Greece from 1836 to 1862 as the spouse of King Otto of Greece (1815–1867).
As the daughter of Duke Paul Frederick Augustus of Oldenburg (later Grand Duke of Oldenburg), she was born a Duchess of Oldenburg. In Greece, the title "Duchess of Oldenburg" was never in use.
When she arrived in Greece in 1837, she at first won the hearts of the Greeks with her refreshing beauty. After the Queen became more politically involved, however, she became the target of harsh attacks - and her image suffered further as she proved unable to provide an heir. After an uprising, she and her husband were expelled from Greece in 1862. She spent the rest of her years in exile in Bavaria.