Prince Heinrich XXIV Reuss of Köstritz, also Prince Heinrich XXIV Reuss, Younger Line (German: Heinrich XXIV. Prinz Reuß zu Köstritz, also Heinrich XXIV. Prinz Reuß jüngere Linie, December 8, 1855 in Trebschen – October 2, 1910 in Ernstbrunn, Austria) was a German composer.