Friedrich, Duke of Schleswig-Holstein-Sonderburg-Glücksburg (23 October 1814 – 27 November 1885) was the third Duke of Schleswig-Holstein-Sonderburg-Glücksburg from 1878 to 1885.

[1] Friedrich was the second-eldest son of Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and Princess Louise Caroline of Hesse-Kassel and the elder brother of King Christian IX of Denmark.

[1] Friedrich inherited the title of Duke of Schleswig-Holstein-Sonderburg-Glücksburg upon his childless brother Karl's death on 14 October 1878.

[1] Friedrich married Princess Adelheid of Schaumburg-Lippe, second-eldest daughter of George William, Prince of Schaumburg-Lippe and Princess Ida of Waldeck and Pyrmont, on 16 October 1841 in Bückeburg, Schaumburg-Lippe.

[2] Friedrich and Adelheid had five children:[citation needed]