Heinrich XXVII Prince of Reuss Younger Line
- Category : 1858-births
- Type : MGE
- Profile : 6/2 - Role Model / Hermit
- Definition : Split - Small (6,7,8,10,13,34)
- Incarnation Cross : LAX Defiance 2
Prussian monarch, the last reigning Prince Reuss Younger Line from 1913 to 1918, who then became Head of the House of Reuss Younger Line from 1918 to 1928.
Heinrich XXVII was the eldest child of Heinrich XIV, Prince Reuss Younger Line (1832–1913) and his wife, Duchess Agnes of Württemberg (1835–1886).
He married Princess Elise of Hohenlohe-Langenburg (1864–1929) on 11 November 1884 at Langenburg. They had five children.
He died on 21 November 1928, aged 70, in Gera, Weimar Republic.