

| Jamaica | Mary, on feast of her Assumption |
| Japan | Francis Xavier, Our Lady of Japan, Peter Baptist |
| Jesuit Order; Jesuits | Ignatius of Loyola |
| Jesuit students | Aloysius Gonzaga |
| Jewelers | Eligius (Eloi) |
| Joiners | Joseph, Thomas, Apostle |
| Jordan | John the Baptist |
| Journalists | Francis de Sales |
| Journeys, safe | Christopher |
| Judges/Jurists | John of Capistrano, Ivo of Kermartin |
| Jumping | Venantius |
| Justice, social | Martin de Porres |
| Juvenile delinquents | Dominic Savio |
|
|
|