Heinrich XXVII, Prince Reuss Younger Line (German: Heinrich XXVII Fürst Reuß jüngere Linie; 10 November 1858 – 21 November 1928) was the last reigning Prince Reuss Younger Line from 1913 to 1918.
Then he became Head of the House of Reuss Younger Line from 1918 to 1928.