Princess Marie Agnes Henriette of Hohenlohe-Langenburg, full German name: Marie Agnes Henriette, Prinzessin zu Hohenlohe-Langenburg (5 December 1804 – 9 September 1835) was a member of the House of Hohenlohe-Langenburg and a Princess of Hohenlohe-Langenburg by birth.

Through her daughter Adelaide of Löwenstein, Agnes is an ancestor to numerous Roman Catholic European royal families.

Agnes was the eleventh child of Karl Ludwig III, Prince von Hohenlohe-Langenburg and his wife Countess Amalie Henriette of Solms-Baruth.

Agnes married Constantine, Hereditary Prince of Löwenstein, eldest child and only son of Charles Thomas, Prince of Löwenstein and his wife Countess Sophie of Windisch-Grätz, on 31 May 1829 at Schloss Wildeck in Zschopau, Kingdom of Saxony.

[citation needed] Agnes and Constantine had two children: