Philipp I of Katzenelnbogen (1402–1479), also known "Philipp the Elder" was Count of Katzenelnbogen from 1444 to 1479 and was the last male descendant of the Counts of Katzenelnbogen. His parents were Johann IV, Count of Katzenelnbogen and Anne of Katzenelnbogen, who merged the two lines of the family back together in 1402.