Duchess Maria Isabella Philippine Theresia Mathilde Josephine of Württemberg (German: Maria Isabella Philippine Theresia Mathilde Josephine, Herzogin von Württemberg) (30 August 1871 – 24 May 1904) was a member of the House of Württemberg and a Duchess of Württemberg by birth and a member of the House of Wettin and a Princess of Saxony through her marriage to Prince Johann Georg of Saxony.