| Walram IV, Count of Nassau-Idstein | |
| Noble Family: | House of Nassau |
| Father: | Adolph I, Count of Nassau-Wiesbaden-Idstein |
| Mother: | Margaret of Nuremberg |
| Spouse: | Bertha of Westerburg |
| Birth Date: | 1354 |
Count Walram IV of Nassau-Idstein (1354 - 7 November 1393) was a younger son of Count Adolph I of Nassau-Wiesbaden-Idstein and his wife Margaret of Nuremberg. He inherited Nassau-Idstein when his father died in 1370. When his brother Gerlach II died in 1386, he also inherited Nassau-Wiesbaden.
He married Bertha, the daughter of Count John I of Westerburg. They had two children: