Heiligkreuzsteinach is a town in the district of Rhein-Neckar in Baden-Württemberg in Germany, about 25 km northeast of Heidelberg. From 1525 it was part of the Electoral Palatinate. With the end of the Electoral Palatinate in 1803 Heiligkreuzsteinach became part of Baden and after the union of Baden and Wurttemberg in 1952 it became part of the new established German State Baden-Württemberg.