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- Peter Jankowski - television producer (College of the Holy Cross, MA)
Barnaby Joyce - Australian senator (St Ignatius' College, Riverview, Sydney)
- James Joyce - Irish novelist and winner of the Nobel Prize for Literature (Clongowes Wood College Co. Kildare and Belvedere College Dublin)
- John Paul I - Pope (Gregorian University, Rome)
- Paul Johnson - British journalist, historian, speechwriter and author (Stonyhurst College)
- Pierre-Marc Johnson - Former Quebec Premier (College Jean-de-Brebeuf, Montreal)
- Edward P. Jones - American novelist and Pulitzer Prize winner (College of the Holy Cross)
- Raúl Juliá - American actor (Colegio San Ignacio de Loyola)
Read more about this topic: List Of Alumni Of Jesuit Educational Institutions