- ✠ Saint Sabas, Patriarchal Abbot in Palestine
- ✠ Saint Sabinus, Bishop of Spoleto, and Companions, Martyrs
- ✠ Saint Sanctus, and Forty-Eight other Martyrs of Lyons
- ✠ Saint Saturninus, Bishop and Martyr
- ✠ Saint Scholastica, Abbess
- ✠ Saint Sebastian, Martyr
- ✠ Saints Sennen (and Abdon), Persian Martyrs at Rome
- ✠ Saints Seraphia and Sabina, Martyrs
- ✠ Saint Serenus, Solitary, Martyr
- ✠ Holy Servite Founders
- ✠ Saint Servulus of Rome, Invalid and Beggar
- ✠ Saint Severianus, Bishop and Martyr
- ✠ Saint Severinus, Abbot
- ✠ Saint Silverius, Pope and Martyr
- ✠ St. Simeon of Jerusalem, Bishop and Martyr
- ✠ St. Simeon Stylites
- ✠ Saint Simon, Infant Martyr
- ✠ Saints Simon and Jude, Apostles and Martyrs
- ✠ Saint Simon Stock, Superior General of the Carmelite Order
- ✠ St. Simplicius, Pope
- ✠ Sts. Soter and Caius, Popes, Martyrs
- ✠ Saint Stanislaus Kostka, Jesuit, Patron of Youth
- ✠ St. Stanislaus of Cracow, Bishop, Martyr
- ✠ Bl. Stephanie Quinzani, Virgin
- ✠ Saint Stephen, Deacon and Protomartyr
- ✠ Saint Stephen I, Pope and Martyr
- ✠ Saint Stephen of Hungary, King of Hungary
- ✠ Finding of St. Stephen’s Relics
- ✠ Saint Susanna, Virgin and Martyr
- ✠ Saint Sylvester, Pope and Confessor
- ✠ Saint Symphorian, Martyr
