John I (German: Johann I.) (15 May 1459 – 27 January 1509) was the Count Palatine of Simmern from 1480 until 1509.
John was born in 1459 to Frederick I, Count Palatine of Simmern.
He married Joanna of Nassau-SaarbrĂĽcken the daughter of Johann II of Nassau-SaarbrĂĽcken on 29 September 1481.
John died in Starkenburg in 1509 and was buried in Simmern.