- Bademus, Martyr
- Baptism of Our Lord
- Barachisius, (Jonas and their Companions), Martyrs
- Barbara, Virgin and Martyr
- Barbatus, Bishop of Benevento
- Barnabas, Apostle
- Bartholomew, Apostle and Martyr
- Bartholomew Amidei, one of the Seven Holy Servite Founders
- Basil the Great, Bishop, Doctor of the Church
- Basilissa, and Julian, Martyr
- Bede the Venerable, Father of the Church
- Benedict, Father of Western Monasticism
- Benedict of Anian, Abbot
- Benedict Cottolengo, Founder
- Benedict dell'Antella, one of the Seven Holy Servite Founders
- Benedict Joseph Labre, Mendicant, Pilgrim
- Bernadette Soubirous, Virgin
- Bernard, Abbot of Clairvaux
- Bernardine of Siena, Franciscan Missionary Preacher
- Bertha, Widow, Abbess
- Bertilla, Abbess
- Bibiana, Virgin and Martyr
- Blaise, Bishop and Martyr
- Blandina and Forty-Eight other Martyrs of Lyons
- Blood of Jesus, (Most Precious...)
- Bonaventure, Cardinal-Bishop, Doctor of the Church
- Boniface, Bishop, Martyr
- Brendan the Navigator, Abbot of Clonfert
- Bridget of Sweden, Widow
- Bridgid, Abbess and Patroness of Ireland
- Bruno, Founder of the Order of the Chartreuse or Carthusian Order
- Buonfiglio Monaldo, one of the Seven Holy Servite Founders
