Julius Zerfaß (Kirn, 4 February 1886 - Zürich, 24 March 1956) was a German journalist of the anti-Hitler "Poison Kitchen" group of the 1920s.
He was interned at Dachau Concentration Camp but on release escaped to Switzerland, where he published Eine Chronik (1936), one of the first accounts of the camp, under the pseudonym Walter Hornung.