John IV | |
|---|---|
| Count of Armagnac | |
 | |
| Born | 15 October 1396 |
| Died | 5 November 1450 (aged 54) |
| Noble family | Armagnac |
| Spouses | Blanche of Brittany Isabella d' Évreux |
| Issue more... | |
| Father | Bernard VII of Armagnac |
| Mother | Bonne de Berry |
John IV (15 October 1396 – 5 November 1450) was a Count of Armagnac, Fézensac, and Rodez from 1418 to 1450. He was involved in the intrigues related to the Hundred Years' War and in conflicts against the King of France.