'''Weitnauer''' is a surname, derived from the Bavarian town of Weitnau. Notable people with this name include:
*{{ill|Albert Weitnauer|de}} (1916–1984), Swiss diplomat *{{ill|Alfred Weitnauer|de}} (1905–1974), German writer and historian *Emil Weitnauer (1905–1989), Swiss ornithologist *{{ill|Hermann Weitnauer|de}} (1910–1999), German jurist *Jürg Weitnauer (born 1955), Swiss rower *Mary Ann Weitnauer, American electrical engineer *{{ill|Wolfgang Weitnauer|de}} (born 1954), German jurist
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