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