- ✠ Saint Ladislas I, King of Hungary
- ✠ Saint Lambert, Bishop of Maestricht, Martyr
- ✠ St. Laurence O’Toole, Archbishop of Dublin, Martyr
- ✠ Saint Lawrence, Deacon and Martyr
- ✠ Saint Lawrence Justinian, First Patriarch of Venice
- ✠ Saint Leander, Archbishop of Seville
- ✠ Saint Leo II, Pope
- ✠ Saint Leo IX, Pope
- ✠ St. Leo the Great, Pope
- ✠ Saint Leocadia, of Toledo, Virgin and Martyr
- ✠ Saint Leonard, Hermit, Patron of prisoners
- ✠ St. Leonides, Martyr
- ✠ Sts. Liberatus and Companions, Martyrs
- ✠ Saint Linus, Pope and Martyr
- ✠ Translation of the House of Loreto
- ✠ Saint Louis Bertrand, Dominican Missionary and Preacher
- ✠ Saint Louis IX, King of France
- ✠ St. Louis Mary de Montfort, Doctor of the Mediation of Mary, Missionary in France and Founder
- ✠ Saint Louis of Toulouse, Bishop
- ✠ Bl. Luchesio, Confessor, First Franciscan Tertiary
- ✠ Saint Lucian, Martyr
- ✠ Saint Lucy, of Syracuse, Virgin and Martyr
- ✠ Saint Ludger, First Bishop of Munster
- ✠ Saint Luke, Evangelist
- ✠ Saint Lupicinus (and his brother Romanus), Abbot
- ✠ Saint Lupicinus (and his brother Romanus)
- ✠ St. Lydwina of Schiedam, Virgin, Infirm
