Willi (Willy) Lehmann (born 15 March 1884, Leipzig; died December 1942, Berlin, age 58) was a police official and Soviet agent in Nazi Germany. Lehmann was a criminal inspector and SS-Hauptsturmführer (captain), alias Agent A-201/Breitenbach. During World War II Lehmann was one of the most valuable sources for the NKVD in Germany.