| Anna of Katzenelnbogen | |
| Father: | Philipp I, Count of Katzenelnbogen |
| Mother: | Anna of Württemberg |
| Spouse: | Henry III, Landgrave of Upper Hesse |
| Birth Date: | 5 September 1443 |
| Birth Place: | Katzenelnbogen, Hessen-Nassau, Deutschland |
| Death Place: | Marburg, Hessen-Nassau, Deutschland |
| Issue: | Frederick Ludwig III Elisabeth of Hesse-Marburg William III, Landgrave of Hesse Mathilde of Hesse Heinrich |
| Burial Place: | St. Elizabeth's Church, Marburg, Germany |
Anna of Katzenelnbogen (5 September 1443 in Katzenelnbogen - 16 February 1494 in Marburg) was the daughter of Philipp I, Count of Katzenelnbogen (1402–1479), and his first wife Anna of Württemberg (1408–1471). She is notable for being the great-grandmother to Anne of Cleves the fourth wife of King Henry VIII of England.
Anna was born on 5 September 1443 into the Katzenelnbogen noble family, was the only daughter of Philipp I, Count of Katzenelnbogen, and his first wife Anna of Württemberg. daughter of Eberhard IV "the Younger" of Württemberg, and his wife Henriette, Countess of Montbéliard. Anna had two elder brothers. They were:
Anna married Henry III, Landgrave of Upper Hesse on 1458. Henry would earn the nickname "the Rich" due to the territorial gains associated with the marriage, which also came with considerable financial gain, including the lucrative revenues from Rhine customs. Her husband inherited the possessions of the Katzenelnbogen family when the Katzenelnbogen male line died out after the death of her father Philipp in 1479. The County of Katzenelnbogen fell to the Landgraviate of Hesse, which was ruled at the time by her husband Henry III of Hesse in Marburg, after he had bought off the inheritance rights of Philipp's granddaughter Ottilie.
The couple had four sons, and two daughters, they were:
Anna died on 16 February 1494 from unspecified causes aged 50 in Marburg. She was laid to rest in St. Elizabeth's Church where her husband would be buried at his own death almost eight years later.