John V of Nassau-Vianden-Dietz
|Born||9 November 1455|
|Died||30 July 1516 (aged 60)|
|Noble family||House of Nassau|
|Spouse(s)||Elisabeth of Hesse-Marburg|
|Father||John IV of Nassau|
|Mother||Maria of Loon-Heinsberg|
Johann V of Nassau-Vianden-Dietz (Breda, 9 November 1455 – Dillenburg, 30 July 1516) was count of Nassau (in Siegen, Dillenburg, Hadamar and Herborn), Vianden and Diez, and Lord of Breda. He was the paternal grandfather of William the Silent.
In 1472 a treaty was conducted with his brother Engelbert II of Nassau in which he was granted the Nassau territory and his brother received the possessions in the Netherlands and left of the Rhine.
In 1504 after the death of his brother Engelbrecht II of Nassau in Breda without an heir, Johann's eldest son Henry III of Nassau-Breda succeeded him.
Count Johann V was buried at Siegen. His Dutch possessions went to his eldest son Henry, his German possessions to his other son William.