Princess Florestine Gabrielle Antoinette of Monaco (Full French name: Florestine Gabrielle Antoinette, Princesse de Monaco) (22 October 1833 in Fontenay-aux-Roses, Kingdom of the French – 4 April 1897 in Stuttgart, Kingdom of Württemberg) was the youngest child and only daughter of Florestan I, Prince of Monaco, and his wife Maria Caroline Gibert de Lametz.
Florestine was a member of the House of Grimaldi and a Princess of Monaco by birth and a member of the House of Württemberg and Duchess consort of Urach and Countess of Württemberg through her marriage to Wilhelm, 1st Duke of Urach.