John I (15 May 1459 – 27 January 1509) was the Count Palatine of Simmern from 1480 until 1509.

[1] John was born in 1459 to Frederick I, Count Palatine of Simmern.

He married Joanna of Nassau-Saarbrücken (1464 - 1521) the daughter of Johann II of Nassau-Saarbrücken on 29 September 1481.

John died in Starkenburg in 1509 and was buried in Simmern.

With Joanna of Nassau-Saarbrücken (14 April 1464 – 7 May 1521)