|Intro||Count of Nassau-Vianden-Dietz, Lord of Breda and Stadtholder of Guelders and Zutphen|
|A.K.A.||Jean v de nassau-dillenbourg, Jean V De Nassau-Dillenbourg|
|Birth||9 November 1455, Breda, Netherlands|
|Death||30 July 1516, Dillenburg, Germany (aged 60 years)|
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.
Johann V was in 1504 and 1505 stadtholder of Guelders and Zutphen. In 1504, he inherited Breda and Vianden from his brother Engelbrecht II of Nassau.
Johann V married in 1482 to Elisabeth of Hesse-Marburg, a daughter of Henry III, Landgrave of Upper Hesse and his wife Anna of Katzenelnbogen. They had 6 children:
- Henry III of Nassau-Breda (1483–1538)
- Johann of Nassau-Vianden-Dietz (1484–1504)
- Ernst (1486)
- William I, Count of Nassau-Dillenburg (1487–1559), father of William the Silent.
- Elisabeth of Nassau (1488–1559)
- Maria of Nassau (1491–1547)
Count Johann V was buried at Siegen.
His Dutch possessions went to his eldest son Henry, his German possessions to his other son William.