Count Johann VI of Nassau-Dillenburg was a nobleman from the House of Nassau, born in 1536. He was the son of Count Wilhelm of Nassau-Dillenburg and Countess Juliana of Stolberg. Johann VI played a significant role in the political landscape of the Holy Roman Empire during the 16th century, particularly in the region of Nassau. He is best known for his support of the Protestant Reformation and his involvement in the Dutch Revolt against Spanish rule. Johann VI's leadership helped to shape the future of the Nassau territories, and he was a key figure in the development of the Nassau-Dillenburg lineage until his death in 1606.