Dedicated to the Most Holy Rosary
- October 1
- St. Remigius, Bishop
- October 2
- Feast of All Holy Guardian Angels
- October 3
- St. Therese of Liseux, the Little Flower
- October 4
- St. Francis of Assisi, Founder of the Franciscan Order
- October 5
- SS. Placid and Companions, Martyrs
- October 6
- St. Bruno, Founder of the Carthusian Order
- October 7
- Our Lady, Queen of the Most Holy Rosary
- St. Mary of Victory
- Pope St. Mark I
- SS. Sergius, Bacchus, Marcellus, and Apuleius, Martyrs
- October 8
- St. Simeon the Prophet (Lk. ii.)
- St. Bridget of Sweden, Mystic
- October 9
- St. Abraham the Patriarch
- St. Denis, Bishop and Martyr
- St. John Leonardi, Priest
- October 10
- St. Francis Borgia
- St. Paulinus of York
- October 11
- The Divine Maternity of the Blessed Virgin Mary
- October 12
- Our Lady of the Pillar (In Spain)
- SS. Evagrius, Priscian and Companions, Martyrs in Africa
- St. Monas, Bishop
- Bl. Jeanne Leber, Recluse
- October 13
- Anniversary of the Miracle of the Sun (Our Lady of Fatima)
- St. Edward III, King of England
- St. Gerald
- October 14
- Pope St. Callixtus (Callistus) I, Martyr
- St. Gaudentius, Bishop and Martyr
- SS. Carponius, Evaristus, and Priscian, Martyrs
- St. Fortunata, Virgin and Martyr
- October 15
- St. Teresa of Avila, Mystic
- October 16
- St. Eliphius, Martyr
- St. Florentine, Bishop
- St. Gerard Majella
- St. Hedwig, Duchess and Widow
- October 17
- St. Margaret Mary Alacoque, Mystic
- St. Rudolph of Gubbio, Bishop
- October 18
- St. Luke the Evangelist, Martyr
- October 19
- St. Peter Alcantara, Franciscan Priest
- October 20
- St. John Cantius, Priest
- October 21
- St. Ursula and 11000 Companions, Martyrs
- St. Hilarion
- Bl. Charles of Austria
- October 22
- St. Mary Salome, mother of SS. James the Greater and John the Apostles
- St. Cordula, Virgin and Martyr, Companion of St. Ursula
- October 23
- St. Anthony Mary Claret, Archbishop, Missionary of the Canary Islands, and Founder
- October 24
- St. Raphael the Archangel
- October 25
- SS. Chrysanthus and Daria, Martyrs
- SS. Crispin and Crispinian, Martyrs
- October 26
- Pope St. Evaristus
- October 27
- St. Frumentius
- October 28
- SS. Simon and Jude the Apostles, Martyrs
- October 29
- St. Theodore
- St. Narcissus
- St. Linda
- October 30
- St. Alphonsus Rodriguez
- St. Romuald
- St. Germanus of Capua
- October 31
- Vigil of All Saints (All Hallows Eve, Vigil of Fasting and Complete Abstinence)
- St. Wolfgang, Bishop