Duchess Agnes of Württemberg (German: Herzogin Pauline Louise Agnes von Württemberg; 13 October 1835 – 10 July 1886) was a German aristocrat and writer under the pseudonym of Angela Hohenstein.

Duchess Agnes was born at Carlsruhe, Kingdom of Prussia (now Pokój, Poland) was the youngest child of Duke Eugen of Württemberg (1788–1857), (son of Duke Eugen of Württemberg, and Princess Louise of Stolberg-Gedern (1764-1834)) by his second marriage to Princess Helene of Hohenlohe-Langenburg, (daughter of Karl Ludwig, Prince of Hohenlohe-Langenburg and Countess Amalie Henriette of Solms-Baruth). Agnes had three half-siblings by her father's previous marriage with Princess Mathilde of Waldeck and Pyrmont.

Agnes founded numerous foundations and institutions that bore her name, such as the Agnes School, a school for female servants in Gera.

Agnes married on 6 February 1858 at Karlsruhe to Heinrich XIV, Prince Reuss Younger Line (1832–1913), son of Heinrich LXVII, Prince Reuss Younger Line and Princess Adelheid of Reuss-Ebersdorf.

They had two children:

• Heinrich XXVII, Prince Reuss Younger Line (10 November 1858 – 21 November 1928), married in 1884 to Princess Elise of Hohenlohe-Langenburg, had issue.
• Princess Elisabeth Reuss of Schleiz (27 October 1859 – 23 February 1951), married in 1887 to Prince Hermann of Solms-Braunfels, had issue.

• Helene (narrative, 1867)
• From a lovely time. Eight images (incl.: Fra Angelico Giovanni da Fiesole, Roswitha, From Venice, a fantasy forest, three folk songs in a picture, In the back room, the lilies of the cemetery Meran, Johann Arnold's diary, 1878)
• The blessing of the Grandmother (Family picture in two volumes, 1880)

• The Royal House of Stuart, London, 1969, 1971, 1976, Addington, A. C., Reference: II 223
• Genealogisches Handbuch des Adels, Fürstliche Häuser, Reference: 1956
• L'Allemagne dynastique, Huberty, Giraud, Magdelaine, Reference: II 525