Tanja Schleiff (born in 1973 in Erfurt) is a German actress.

The daughter of actors Renate Hundertmark and Klaus Schleiff, she trained in acting at the Felix Mendelssohn Bartholdy University of Music and Theatre in Leipzig. She began her career on stage, performing notably at the Residenztheater in Munich and the Schauspielhaus in Düsseldorf.