Duncker is a surname. Notable people with the surname include:
Alexander Duncker (1813–1879), German publisher and bookseller Carl Friedrich Wilhelm Duncker (1781–1869), German publisher Franz Duncker (1822–1888), German publisher, politician, and social reformer. Georg Duncker (1870–1953), German ichthyologist Hans Julius Duncker (1881–1961), German ornithologist Hermann Duncker (1874–1960), German Marxist politician, historian and social scientist Joachim Zachris Duncker (1774–1809), Swedish soldier Karl Duncker (1903–1940), German psychologist Käte Duncker (1871–1953), German activist and politician Maximilian Wolfgang Duncker (1811–1886), German historian and politician Patricia Duncker (born 1951), British novelist and academic Wolfgang Duncker (1909–1942), German journalist and film critic
See also Dunker (disambiguation)