| Princess Agnes | |
| Full Name: | German: Marie Agnes Henriette |
| Hereditary Princess of Löwenstein-Wertheim-Rosenberg | |
| Spouse: | Constantine, Hereditary Prince of Löwenstein-Wertheim-Rosenberg (m. 1829) |
| Issue: | Adelaide, Queen of Portugal Charles, Prince of Löwenstein-Wertheim-Rosenberg |
| House: | Hohenlohe-Langenburg |
| Father: | Karl Ludwig, Prince of Hohenlohe-Langenburg |
| Mother: | Countess Amalie Henriette of Solms-Baruth |
| Birth Date: | 5 December 1804 |
| Birth Place: | Langenburg, Principality of Hohenlohe-Langenburg |
| Death Place: | Haid, Kingdom of Bohemia, Austrian Empire |
| Burial Place: | Engelberg Monastery, Großheubach, Bavaria |
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 marriage to Constantine, Hereditary Prince of Löwenstein, Agnes was also a member of the House of Löwenstein and Hereditary Princess of Löwenstein. 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. Agnes and Constantine had two children: