Sabas, Abbot
Sabas Reyes Slazar, Priest, Cristero Martyr
Sabas the Youth
Sabina of Rome, Matron and Martyr
Sabina of Talavera, Martyr, Sister of Sts. Cristeta and Vincent of Avila
Sabinianus, Martyr of Cordoba
Sabinus, Bishop of Assisi, Martyred in Spoleto
Sabinus (Abibus), of Egypt, Procurator of Hermopolis, Martyr
Sacerdos, Bishop of Lyon
Sadoth (Sadoc), Metropolitan of Celeucia/Ctesiphon, Martyred by the Persians
Salomea, Queen, Matron, Abbess of the Poor Clares at Zawichost (later moved to Skala)
Salonius, Bishop of Geneva
Salustianus of Sardinia, Martyr
Salvador, Martyr
Salvador Huerta Gutierrez, Mexican Layman, Cristero Martyr
Salvador Lara Puente, Mexican Layman, Cristero Martyr
Salvator of Horta, Spanish Franciscan Brother
Salvinus, Bishop of Maçon
Salvius, Bishop of Alvi
Samonas of Edessa, Martyr
Santinus, Bishop of Verdun
Sara, Egyptian Virgin and Ascetic
Sara the Black, Patroness of the Romani (Gypsy) people
Saturninus, Carthiginian Priest, Martyred in Rome
Saturninus of Carthage, Martyr, One of the Companions of Perpetua and Felicitas
Saturninus, Bishop of Verona
Saturnus, Vandal Companion of St. Armogastes, Martyr
Savinus (Sabinus), Bishop of Conosa, Martyr
Scholastica, Foundress of the Benedictine Sisters
Sebastian, Soldier and Martyr
Sebastian Maggi, Dominican Priest, Reformer
Sebbe (Sebba, Sebbi) King of the East Angles, Benedictine Monk
Secunda. Virgin and Martyr
Secundinus, Bishop of Palestrina
Secundinus, Martyr
Secundinus (Sechnall), Irish Bishop, Nephew of St. Patrick
Secundus, Martyr
Secundus, Priest, Martyred at Barca, near Alexandria
Senan of Inis Cathaigh (Scattery Island) Irish Abbot/Bishop
Senator, Bishop of Milan
Sennen, Martyr
Serafina of Galicia, early convert
Seraphim of Sarov, Russian monk and mystic
Seraphina (Fina) of St. Gemignano
Seraphino of Ascoli, Capuchin Priest
Seraphinus of Montegrano, Capuchin Lay Brother
Serapia, Virgin and Martyr
Serapion, Patriarch of Antioch
Serapion, Bishop of Thmuis, Egypt, “the Scholastic,” head of the Catechetical School of Alexandria
Serapion, Martyr
Serena of Spoleto, Virgin and Martyr
Serenus, Disciple of Origen, companion of Plutarch, Martyr
Serenus of Sirmium, Martyr
Sergius I, Pope
Sergius of Caesarea in Cappadocia, Martyr
Sergius, Soldier and Martyr, Companion of St. Bacchus
Sergius of Radonzeh, Father of Russian Monasticism, Abbot of Holy Trinity Monastery
Serrano (Serranus), Bishop of Oviedo
Servanus (Serf), Apostle to the Orkneys
Servatius, 1st Bishop of Tongern and Maastricht
Servulus of Trieste, Martyr
Seven Apostolic Men: Clerics ordained in Rome and sent to convert Spain
    Torquatus (Guadix)
    Ctesiphon (Berja)
    Hesychius (Cazorla)
    Indalecius (Pechina)
    Secundus (Avila)
    Euphrasius (Andujar)
    Caecilius (Elvira/Granada)
Severianus, Martyr
Severinus of Norica, Martyr
Severinus, Bishop of Septempeda (now San Severino)
Severinus, Bishop, either of Bordeaux or Cologne
Severus, Bishop of Barcelona, Martyr
Severus, Bishop of Catania, Sicily
Sibilbald, Bishop of Metz
Sibyllina Biscossi of Pavia, Dominican Tertiary
Sidonius, Roman, Martyred under Aurelian, enshrined in Flanders
Sigebald, Bishop of Metz
Sigebert I, King of East Anglia
Sigfried, Bishop of Sweden (baptized St. Olaf)
Sigismund, King of Burgundy, Martyr
Silvanus, Bishop of Gaza
Silvanus, Associate of St. Paul
Silvanus, Martyred in Alexandria
Silverius, Pope
Silvester I, Pope
Silvester Guzzolini, Abbot, Founder if the Silvestrine Benedictines
Silvius, Bishop of Toulouse
Simeon, Second Bishop of Jerusalem and Cousin of Our Lord
Simeon Cardon and 5 Companions, Cistercian Martyrs of Casamari
Simeon the God-Receiver of Jerusalem
Simeon Stylites
Simon the Apostle
Simon Stock, Carmelite Priest, Superior General of the Order
Simon Mchajlovic of Volom, Russian Priest, Martyr
Simplicianus, Bishop of Milan, Successor of St. Ambrose, Friend of St. Augustine
Simplicius, Pope
Simplicius, Martyr
Synphonianus, of Autun, Martyr
Sirus (Horus), Bishop, Martyred in Alexandria
Sisebuto, Abbot of Cardena
Sisinius, Martyr
Sisto Riario Sforza, Cardinal Archbishop of Naples
Sixtus I, Bishop of Rheims
Sixtus I, Pope and Martyr
Sixtus III, Pope
Solanus Casey, Franciscan Priest from Detroit
Solemnius, Bishop of Chartres
Solomon, Portuguese, martyred in Cordoba
Solutor, Martyr, Patron of Turin
Sophia, Martyr
Sophia, Roman Virgin, Martyr
Sophia, Widow
Sophia (Soilomonia Jurievn Saburova) of Suzdal, Princess of Moscow
Sophronius, Patriarch of Jerusalem
Soprata, Virgin, Daughter of Byzantine Emperor Maurice
Sosthenes Sostegni, One of the Seven Holy Founders of the Servite Order
Soter, Pope and Martyr
Sotera, Martyr
Soteria, Great-Grandmother of St. Ambrose of Milan
Sotiro (Zuwarda), Virgin, Martyred in Dordrecht, Holland
Speciosa of Antioch, Virgin and Martyr
Speranza di Gesu (Giuseppa Alhama Valera), foundress of the Handmaids of Merciful Love
Stanislaus, Bishop of Cracow and Martyr
Stanislaus Kostka, Jesuit Novice
Stephania, Coptic Martyr
Stephen I, Pope and Martyr
Stephen Bandelli, Dominican Priest
Stephen, Bishop of Chantillon
Stephen Harding, One of the Three Co-founders of the Cistercians
Stephen (Istvan), King of Hungary
Stephen the First Martyr, Deacon
Stephen of Grandmont, Founder of the extinguished Order of Grandmont
Stephen of Obazine, French Hermit, Founding Abbot of Obazine Cistercian Abbey
Stephen Pongracz, Hungarian Jesuit Priest, martyred in Košice, Slovakia
Successus, Martyr
Sulpice (Sulpitius II), Archbishop of Bourges
Sulpice (Sulpitius I) Bishop of Bourges
Surano, Abbot, Martyr
Susanna of Rome, Virgin and Martyr
Swibert, Bishop of Northumbria
Swithun, Bishop of Winchester
Sylvester, Pope
Sylvia, Widow (Mother of St. Gregory the Great)
Symmachus, Pope
Symmetrius of Rome, Priest and Martyr
Symphorosa of Tivoli, Widow, Martyred with her Sons
Synesius of Rome, Lector and Martyr
Symphorian, Senator and Martyr
Symphorosa, Widow, Martyred in Tivoli
Syrus, Bishop of Genoa
Syrus, Bishop of Pavia