John IX
# John IX

John IX may refer to:

* Pope John IX (died 900)
* John IX bar Shushan (died 1073), Syriac Orthodox Patriarch of Antioch
* John IX of Constantinople, Patriarch of Constantinople, 1111–1134
* John IX of Haugwitz, 1524–1595
* John IX, Count of Oldenburg, 1272–c. 1301
* John IX of Salm-Kyrburg-Mörchingen, 1575–1623
