Horst Heilmann (* 15 April 1923 in Dresden; †22 December 1942 in Plötzensee Prison) was a German resistance fighter who was a member of the anti-fascist resistance group that was later called the Red Orchestra by the Gestapo.
Heilmann was also a student and a wireless operator who worked at the Referat 12 that was in the Inspectorate 7/VI.