Duchess Marie of Württemberg (Antoinette Friederike Auguste Marie Anna Herzogin von Württemberg; 17 September 1799 – 24 September 1860) was a daughter of Duke Alexander of Württemberg and Antoinette of Saxe-Coburg-Saalfeld.
She was Duchess of Saxe-Coburg and Gotha from 1832 to 1844 as the second wife of Duke Ernest I.
As such, she was the stepmother of Prince Albert, consort of Queen Victoria.