Ittner is a surname. Notable people with the surname include:
Alfred Ittner (1907–1976), SS functionary of Nazi Germany Anthony F. Ittner (1837–1931), US-politician and brick manufacturer Chester Ittner Bliss (1899–1979), American statistician Eva-Maria Ittner (born 1961), German fencer Martin Ittner (1870–1945), American chemist William B. Ittner (1864–1936), American architect
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