October 1
editAbai (martyr); Abhai the general; Abiathar and Sidonia; Abreha & Atzbeha; Ezana of Axum; Gregory the Illuminator; Mar Khnana; Saint Remigius; Romanos; Saizana;
October 2
editAdmonius;
October 3
editAbd-al-Masih (martyr); Abda; Abdalmasih; Adalgisus of Novara; Adalgott of Chur; Agapita; Aldegisus of Novara; Algot of Chur; Aser; Denis; Thérèse de Lisieux; Thomas de Cantilupe;
October 4
editAcepsimas, Leo & Isidore; Adauctus & Callisthene; Francis of Assisi;
October 5
editAgatho;
October 6
editAdalbero of Wurzburg; Aemilius; Aeschil; Bruno of Cologne;
October 7
editOur Lady of the Rosary
October 8
editAetherius of Lyons; Agatho; Alermius; Bridget of Sweden; Demetrius of Alexandria; Etherius;
October 9
editAbraham; Adalbero of Augsburg; Adrianus & Dionysius; Denis; John Leonardi; Louis Bertrand (saint);
October 10
editFrancis Borgia; Paulinus of York;
October 11
editAgilbert of Paris; Aglibert of Paris; Archbishop Atticus of Constantinople; Bruno of Cologne; Archbishop Nectarius of Constantinople;
October 12
editAedistus of Ravenna; Edistius; Martyrs of Africa; Wilfrid;
October 13
editAdrias; Agatho of Alexandria; Agathodorus; Edward the Confessor;
October 14
editAgrates of Vienna; Agricius of Vienne; Pope Calixtus I; Cosmas and Damian; Mar Elia the Tishbite;
October 15
editAgileus; Agleus; Lucian of Antioch; Teresa of Avila; Theophilus of Alexandria;
October 16
editAgapitus; Saint Gall; Longinus (hagiography); Margaret Mary Alacoque; Martyrs of Africa;
October 17
editÆthelthryth; Ignatius of Antioch; John Colobos; Margaret Mary Alacoque; Nothelm; Theophilus of Alexandria;
October 18
editAddaeus; Addai; Agnes; Luke the Evangelist
October 19
editAaron (Saint); Abselema of Edessa; Frideswide; Paul of the Cross; Peter of Alcantara;
October 20
editAcca of Hexham; Adalbert of Prague; Adelina; Aderald; Agricola; Voitech of Prague;
October 21
editAetherius; Afriges, Macarius, Dicus, Proculus and companions; Afrina; Hilarion; Saint Ursula;
October 22
editAaron the Illustrious; Abercius of Hieropolis; Abib and Apollo; Aderald; Adorator; Adrianus; Adrianus, Innocentus, John Paul II, Ursus, Rosatus, Felix, Sisinnius, Exuberantius & Flora; Adrier; Oradour;
October 23
editAaron the Illustrious; Abercius of Hierapolis; Ignatius of Constantinople; James the Just; Giovanni da Capistrano
October 24
editAbraham the Great of Kidunja; Achatius; Adauctus; Proclus of Constantinople; Raphael (archangel);
October 25
editCrispin;
October 26
editAdalgott of Einsiedeln; Aemilianus; Afra; Alfred the Great; Chad of Mercia; Demetrius of Alexandria; Pope Evaristus; Martyrs of Agen;
October 27
editAbban of Kill-Abban; Abban of Magheranoidhe; Abraham the Poor; Adelelmus of Estival; Agapitus and companions; Firmilian; Frumentius;
October 28
editAbdias of Babylon; Abgar V of Edessa; Aemilianus & Valentinus; Africanus, Terentius, Peompejus, Maximus, Zeno, Alexander, Theodorus, Macarius and companions; Jude Thaddeus; Simon the Zealot; Simon and Jude, Apostles;
October 29
editOctober 30
editAchillas of Alexandria; Addaeus; Addai; Agentus; Martyrs of Africa; Mar Youkhanan Tayaya;
October 31
editAbaidas; Beginning of Rogation of St. George the Martyr; Reformation Day (Lutheran)