Then he became head of the House Reuss of Greiz, which became extinct at his death in 1927.

Heinrich XXIV was born at Greiz, Principality of Reuss-Greiz, only son of Heinrich XXII, Prince Reuss of Greiz (1846–1902), (son of Heinrich XX, Prince Reuss of Greiz, and Princess Caroline of Hesse-Homburg) and his wife, Princess Ida of Schaumburg-Lippe (1852–1891), (daughter of Adolf I, Prince of Schaumburg-Lippe and Princess Hermine of Waldeck-Pyrmont).

[2] On the death of his father on 19 April 1902, Heinrich XXIV succeeded him as Prince Reuss of Greiz.

[3] On Heinrich XXIV's death in 1927, the House Reuss of Greiz became extinct, the prince having died unmarried with no issue; the titles passed to Heinrich XXVII of Reuss Younger Line.

[3] Heinrich XXIV died on 13 October 1927 in Greiz, at the age of 49.