John Louis I, Count of Nassau-Wiesbaden-Idstein (10 April 1567 – 10 June 1596) was the son of Count Balthasar of Nassau-Wiesbaden-Idstein and his wife Margaret of Isenburg-Birstein.

[1] He succeeded his father in 1568 as Count of Nassau-Wiesbaden.

In 1588, John Louis married Maria of Nassau-Dillenburg, daughter of John VI, Count of Nassau-Dillenburg.

[1] They had the following children: John Louis l fell out of the window of his residence, Idstein Castle, and drowned in the moat during the baptism for one of his children.

This article about a German count is a stub.