| Blessed Agnello of Pisa |
March 07 (Franciscans), May 07 or September 10 (locally) |
| Blessed Anna of the Angels Monteagudo |
January 10 |
| Blessed Edward Poppe |
June 10 |
| Blessed Francisca de Paula de Jesus Isabel |
June 14 |
| Blessed George Haydock |
November 22 |
| Blessed John Licci |
November 14 |
| Blessed John of Parma |
March 20 |
| Blessed Luke Belludi |
February 17 |
| Blessed María de Jesús de Ágreda |
May 24 |
| Blessed Mariano de Jesus Euse Hoyos |
July 13 |
| Blessed Marie-Clémentine Anuarite Nengapeta |
December 01 |
| Blessed Mary of Jesus the Good Shepherd |
November 21 |
| Blessed Miguel Pro |
November 23 |
| Blessed Villana de'Botti |
February 28 |
| First Martyrs of the See of Rome |
June 30 |
| Forty Martyrs of Sebaste |
March 09 (Eastern Orthodox), March 10 (Roman Catholic) |
| Mother Angelica |
|
| Pope Saint Anastasius I |
December 19 |
| Pope Saint Clement I |
November 23 |
| Pope Saint Cletus |
April 26 |
| Pope Saint Damasus I |
December 11 |
| Pope Saint Eleutherius |
May 26 |
| Pope Saint Gelasius I |
November 21 |
| Pope Saint Gregory the Great |
September 03 |
| Pope Saint Martin I |
April 13 |
| Pope Saint Pius V |
April 30 |
| Pope Saint Soter |
April 22 |
| Rhoda Wise |
|
| Saint Abban the Hermit |
May 13 |
| Saint Adalbald of Ostrevant |
February 02 |
| Saint Adalbert of Magdeburg |
June 20 |
| Saint Ælfheah of Canterbury |
April 19 |
| Saint Agatha |
February 05 |
| Saint Agnes of Bohemia |
March 02 |
| Saint Agnes of Montepulciano |
April 20 |
| Saint Agnes of Rome |
January 21 |
| Saint Aileran |
December 29 |
| Saint Albert the Great |
November 15 |
| Saint Aldegunais of Maubeuge |
January 30 |
| Saint Alexander I |
May 03 |
| Saint Alexis Falconieri |
February 17 |
| Saint Alfred the Great |
October 26 |
| Saint Aloysius Gonzaga |
21 June |
| Saint Alphonsa |
July 28 |
| Saint Alphonsus Liguori |
August 01 |
| Saint Alphonsus Marie Liguori |
August 01 |
| Saint Alphonsus Rodriguez |
October 30 |
| Saint Amalberga |
July 10 |
| Saint Ambrose |
December 07 |
| Saint Anacletus |
April 26 (traditional); July 13 (current Roman Martyrology) |
| Saint Anastasia of Sirmium |
December 25 (Catholic) December 22 (Greek Orthodox) September 28 (Syriac Orthodox) |
| Saint Andre Bessette |
January 06 |
| Saint Andrew Dũng-Lạc |
November 24 |
| Saint Andrew Kim Taegon |
September 20 |
| Saint Andrew the Apostle |
November 30 |
| Saint Angela Merici |
January 27 |
| Saint Anne |
July 26 |
| Saint Anselm of Canterbury |
April 21 |
| Saint Anthony Kauleas |
May 17 |
| Saint Anthony Mary Claret |
October 24 |
| Saint Anthony Mary Zaccaria |
July 05 |
| Saint Anthony of Padua |
June 13 |
| Saint Anthony the Abbot |
January 17 |
| Saint Anthony the Hermit |
December 28 |
| Saint Antipas of Pergamum |
April 11 |
| Saint Anysia of Thessalonica |
December 30 |
| Saint Apollonia |
February 09 |
| Saint Apollonius the Apologist |
April 18 |
| Saint Argeus |
January 02 |
| Saint Artaldus |
October 07 |
| Saint Athanasius of Alexandria |
May 02 (January 18 in Coptic tradition) |
| Saint Auguste Chapdelaine |
July 09 |
| Saint Augustine of Canterbury |
May 26 |
| Saint Augustine of Hippo |
August 28 |
| Saint Barbatus of Benevento |
February 19 |
| Saint Barbea of Edessa |
January 29 |
| Saint Barnabas |
June 11 |
| Saint Bartholomew |
August 24 |
| Saint Bartolo Longo |
5 October |
| Saint Basil the Great |
January 02 |
| Saint Benedict of Aniane |
February 12 |
| Saint Benedict of Nursia |
July 11 |
| Saint Benjamin |
March 31 (Western Christianity), October 13 (Eastern Christianity) |
| Saint Bernadette Soubirous |
April 16 |
| Saint Bernard of Clairvaux |
August 20 |
| Saint Bernard of Montjoux |
May 28 |
| Saint Bernardine of Siena |
May 20 |
| Saint Bibiana |
December 02 |
| Saint Blaise |
February 03 (Western Church), February 11 (Eastern Church) |
| Saint Bonaventure |
July 15 |
| Saint Boniface |
June 05 |
| Saint Boniface of Mainz |
June 05 |
| Saint Bridget of Sweden |
July 23 |
| Saint Brigid of Ireland |
February 01 |
| Saint Brigid of Kildare |
February 01 |
| Saint Bruno of Cologne |
October 06 |
| Saint Cajetan |
August 07 |
| Saint Callistus I |
October 14 |
| Saint Camillus de Lellis |
July 18 |
| Saint Canute IV of Denmark |
July 10 (Denmark); January 19 (universal) |