Landgravine Louise of Hesse-Darmstadt may refer to: Landgravine Louise of Hesse-Darmstadt (1757–1830), daughter of Louis IX, Landgrave of Hesse-Darmstadt; wife of Charles Augustus, Grand Duke of Saxe-Weimar-Eisenach Landgravine Louise of Hesse-Darmstadt (1761–1829), daughter of Landgrave George William of Hesse-Darmstadt; wife of Louis I, Grand Duke of Hesse See also Louise of Hesse-Kassel, queen consort to King Christian IX of Denmark