Princess Louise of Schleswig-Holstein-Sonderburg-Glücksburg (6 January 1858 – 2 July 1936) was the second wife and consort of George Victor, Prince of Waldeck and Pyrmont.

Louise was the third child and second eldest daughter of Friedrich, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and Princess Adelheid of Schaumburg-Lippe; a niece of Christian IX of Denmark and a cousin of Queen Alexandra of United Kingdom, Frederik VIII of Denmark and George I of Greece.

Louise married George Victor, Prince of Waldeck and Pyrmont, son of George II, Prince of Waldeck and Pyrmont and his wife Princess Emma of Anhalt-Bernburg-Schaumburg-Hoym, on 29 April 1891 at Schloss Luisenlund.

Louise's stepchildren included Emma, Queen of the Netherlands (only seven months her junior) and Princess Helena, Duchess of Albany.

Louise died one and one half years before the birth of her step-great-great-granddaughter Beatrix of the Netherlands.