Irm Hermann (born Irmgard Hermann on 4 October 1942) is a German actress.
Hermann became a publishing clerk after finishing school and worked as a secretary for ADAC when she met Rainer Werner Fassbinder in 1966, who convinced her to quit her job to work with him, despite her lack of formal training as an actor. In the same year, Hermann already starred in her debut role in Fassbinder's short film The City Tramp (Der Stadtstreicher), and from then on went to play major characters in 19 of Fassbinder's movies including The Merchant of Four Seasons (Händler der vier Jahreszeiten, 1971) and The Bitter Tears of Petra von Kant (Die bitteren Tränen der Petra von Kant, 1972). Beyond their professional relationship, Irm Hermann soon became one of Fassbinder closest confidantes.
From the mid-1970s, she worked more often for other directors. Since Fassbinder's early death, she has acted in numerous German film and television productions. Hermann starred in the horror drama Die Blutgräfin (2011).