Wiedemann is a German surname. Notable people with the surname include:
Barbara Wiedemann (born 1945), American poet Charlotte Wiedemann (born 1954), German author and journalist Christian Rudolph Wilhelm Wiedemann (1770–1840), German physician, historian, naturalist Elisabeth Wiedemann (1926–2015), German actress Ferdinand Johann Wiedemann (1805–1887), Baltic German linguist Fritz Wiedemann (1891–1970), German soldier, Nazi Party activist and diplomat George Wiedemann (1833–1890), German American brewer Gustav Heinrich Wiedemann (1826–1899), German physicist Eilhard Wiedemann (1852–1928), German physicist and historian of science Alfred Wiedemann (1856–1936), German Egyptologist Hermann Wiedemann (1879–1944), German operatic baritone and teacher Kent M. Wiedemann, American diplomat Elettra Rossellini Wiedemann (born 1983), American fashion model Thorsten Wiedemann (born 1985), German rugby player Thomas Ernst Josef Wiedemann (1950–2001), German-British historian
See also Wiedemann–Franz law, named after Gustav Heinrich Wiedemann Wiedemann Range Wiedeman Wiedmann Wiedermann