- ✠ St. Tarachus, and Companions, Martyrs
- ✠ St. Tarasius, Patriarch of Constantinople
- ✠ Sts. Tarsilla and Emiliana, Virgins
- ✠ St. Teresa of Avila, Virgin, Reformer of the Carmelite Order
- ✠ Saint Thecla, First Virgin Martyr
- ✠ St. Theodore Tyro, Martyr in Asia Minor
- ✠ St. Theodoret, Martyr
- ✠ St. Theodosius, Abbot
- ✠ St. Thérèse of the Child Jesus, Carmelite
- ✠ Saint Thomas, Apostle and Martyr
- ✠ St. Thomas Aquinas, Dominican Priest, Doctor of the Church
- ✠ St. Thomas Becket, Archbishop of Canterbury, Martyr
- ✠ St. Thomas More, Martyr
- ✠ St. Thomas of Villanova, Bishop of Valencia
- ✠ St. Tiburtius, Martyr
- ✠ Saint Timothy, Bishop of Ephesus and Martyr
- ✠ Saint Titus, Bishop
- ✠ Transfiguration, of Our Lord
- ✠ St. Turribius, Archbishop of Lima
