August 1 edit
Abgar V of Edessa; Aled; Alphonsus Liguori; Æthelwold of Winchester; Cenydd; Faith Hope and Charity; Maccabees; Saint Peter’s Chains; Sophia the Martyr; Thomas Welbourn; William Brown;
August 2 edit
Abel; Alphonsus Liguori; Etheldritha; Eusebius of Vercelli; Plegmund; Pope Stephen I; Theodata; Thomas of Dover;
August 3 edit
Abibon; Abraham, Ethnus, Acrates, James, and John; Adalbero of Dissentis; Aedhan of Cluain-Tarbh; Augustine of Lucera; Finding of Saint Stephen; Hippolytus of Rome; Manaccus; Peter Julian Eymard; Waltheof;
August 4 edit
Agabius, Saint Dominic, Jean Vianney, Saint Ia, Saint Sithney,
August 5 edit
Abel of Reims; Addaeus; Addai; Afra; Afra, Formosa, Paulina and Pinnosa; Cassian of Imola; Saint Mari; Dedication of the Basilica di Santa Maria Maggiore; May ad Praesepe; Oswald of Northumbria; Shmouni & her sons;
August 6 edit
Hermisdas; Pope Sixtus II; Transfiguration of Jesus;
August 7 edit
Aedhan McMeallan; Agapitus; Agathangelo and Cassian; Agathangelus Nourry; Albert of Trapani; Saint Cajetan; Claudia; Dometius of Persia; Saint Dominic; John Mason Neale; Pope Sixtus II, Felicissimus and Agapitus; Victricius;
August 8 edit
Aemilianus the Confessor; Agape; Altmann of Passau; Saint Cajetan; Saint Dominic; Fourteen Holy Helpers; Hormisdas; Joanna of Aza; John Felton; Lide;
August 9 edit
Adelphius of Metz; Afeer; Afra; Saint Felim; Jean Vianney; John of Rieti; John of Salerno; Mary Sumner; Saint Matthias; Saint Nathy; Oswald of Northumbria; Romanus Ostiarius;
August 10 edit
Acrates; Agape; Agathonice; Agilberta of Jouarre; Aragwi; Bettelin; James of Manug; Lawrence of Rome; Philomena;
August 11 edit
Abraham and John; Aengus; Afra; Agathangelus Nourry; Agilberta of Jouarre; Alexander of Comana; Attracta; Saint Blane; Clare of Assisi; Equitius; Pope Innocent XI; James of Manug; Lelia; Peter Faber; Saints Tiburtius and Susanna;
August 12 edit
Charles Inglis; Clare of Assisi; Euplus; Jaenbert; St. Murtagh; Saint Procarius; Mar Shimun Bar Sabbae;
August 13 edit
Abundius; Benildus; Cassian of Imola; Gertrude of Altenberg; Hippolytus of Rome; Jeremy Taylor; John of Fermo; Maximus the Confessor; Nerses Klaiëtsi; Novellone; Pope Pontian; Radegund; Wigbert; William Freeman;
August 14 edit
Agnellus of Ravenna; Anthony Primaldi; Saint Athanasia; Dietrich Bonhoeffer; Eusebius of Rome; Saint Fachanan; Marcellus of Apamaea; Maximilian Kolbe;
August 15 edit
Adrianus of Sestra; Arnold of Soissons; Assumption of Mary; Tarcisius;
August 16 edit
Aeglon; Aemilius; Agape; Agnatus; Saint Armel; Arsatius; Holy Women of the Old Testament; Laurence Loricatus; Roch; Stephen I of Hungary;
August 17 edit
Aemilia Bicchieri; Agatha; Agilo; Clare of Montefalco; Pope Eusebius; Saint Hyacinth; Jeanne Delanoue; John Stuart (missionary); Liberatus and Companions; Mammes of Caesarea;
August 18 edit
Mar Achsenaja; Aemilia Bicchieri; Agape; Agapitus of Palestrina; Agatha; Ago of Poitiers; Agon of Poitiers; Beatrix da Silva; Helena of Constantinople; Pope Sixtus III;
August 19 edit
Agapius; Agapius of Caesarea; John Eudes; Mar Qardagh the Martyr;
August 20 edit
Abraham; Pope Agapitus; Agathicus; Bernard of Clairvaux;
August 21 edit
Abraham of Smolensk; Abraham Paleostrowski; Abraham the Laborious; Adelelm; Adelin; Agapius; Agathinus; Immaculate Heart of Mary; Jane Frances de Chantal;
August 22 edit
Acindynus; Agathonicus; John Colobos;
August 23 edit
Abundius; John Colobos; Philip Benizi de Damiani; Seven Bishops of Aelmhagh; Seven Bishops of Donihnarhmor;
August 24 edit
Abban of Ireland; Abshai; Agathus; Agofred of Evreux; Bartholomew the Apostle; Besoy;
August 25 edit
Adalbert of Prague; Adelelmus of Engelberg; Adeltrudis; Pope Agapitus; Gregory of Utrecht; Joseph Calasanctius; Louis IX of France; Mary Michaela Desmaisieres; Simon of Bet-Titta; Apostle Titus; Voitech of Prague;
August 26 edit
Abundius and Irenaeus; Adalar; Adelar; Adelindis; Adrianus; Adrianus; Adrianus Ondrusowski; Agilus; Ayeul; Elizabeth Bircher des Ages; Pope Zephyrinus;
August 27 edit
Aedhan; Aetherius of Lyons; Aethiops; Agrippa and Laurentius; Alermius; Caesarius of Arles; Etherius; Little Saint Hugh of Lincoln; Monica of Hippo;
August 28 edit
Abraham; Achilles; Acindynus; Adelina; Agnes Anglica; Augustine of Hippo; Beheading of St. John the Baptist;
August 29 edit
Abylius; Adauctus; Adausia; Avilius of Alexandria; Beheading of St. John the Baptist; Milius; Sabellius;
August 30 edit
Adauctus; Aeonius of Arles; Fiacre; Saint Pammachius; Robert McDonald; Rose of Lima;
August 31 edit
Abundius of Como; Aedh; Agilbod of Bobbio; Agilus; Aidan of Lindisfarne;