Princess Henriette of Schönaich-Carolath (German: Henriette Hermine Wanda Ida Luise Prinzessin von Schönaich-Carolath; 25 November 1918 – 16 March 1972) was the youngest daughter of Prince Johann George von Schönaich-Carolath and Princess Hermine Reuss of Greiz, who later became the second wife of Wilhelm II, German Emperor.

Princess Henriette was born at Berlin, Weimar Republic, as the fifth child and youngest daughter of Prince Johann George of Schönaich-Carolath (1873–1920; son of Prince George of Schönaich-Carolath and Princess Wanda of Schönaich-Carolath) and his wife, Princess Hermine Reuss of Greiz (1887–1947), daughter of Heinrich XXII, Prince Reuss of Greiz and Princess Ida of Schaumburg-Lippe.

After Princess Henriette's father died in 1920, her mother married secondly in 1922 to the former German Emperor, Wilhelm II. Hermine had five young children, but it was decided that only the youngest, Princess Henriette, would come to live with them at Doorn. Wilhelm generally stayed out of his stepchildren's affairs, with the exception of Henriette. He seemed to have a genuine affection for her, and she came to be known as "the general". According to Giles MacDonough, Henriette "performed the role of resident grandchild, passing the sugar when coffee was served".

On 6 August 1940 at his residence at Doorn, former German Emperor Wilhelm II officially announced his stepdaughter Princess Henriette's engagement with his grandson, Prince Karl Franz of Prussia. Karl Franz (1916–1975) was the only son of Prince Joachim of Prussia and his wife, Princess Marie-Auguste of Anhalt.

The couple were married on 1 October 1940 and had three children:

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