Day | Saints | Country | Year |
| May 11 |
| Saint Anastasio de Lérida, layperson |  Spain | 305 |
| Saint Antimo di Roma, priest |  Italy | 305 |
| Saint Gangulphus (Gangolf d’Avallon), religious |  France | 760 |
| Saint Gautier de Lesterps, abbot | France | 1070 |
| Blessed James Walworth, priest |  England | 1537 |
| Blessed John Rochester, priest | England | 1537 |
| Saint Francesco De Geronimo, priest | Italy | 1716 |
| Saint Ignazio da Laconi (Vincenzo Peis), religious | Italy | 1781 |
| Saint Matthêô Lê Văn Gẫm, layperson |  Vietnam | 1847 |
| Blessed Zeffirino Namuncurá, layperson | Italy | 1905 |
| Blessed Maria Paschalis (Maria Jahn), religious |  Czechia | 1945 |
| Blessed Serafin (Gjon Koda / Serafin Glasnović Kodić), priest |  Kosovo | 1947 |
| Blessed Vincent L’Hénoret, priest |  Laos | 1961 |
| May 12 |
| Saint Pancras of Rome (Pancrazio di Roma), layperson | Italy | 303 |
| Saint Arsenio di Reggio Calabria, religious | Italy | 904 |
| Saint Domingo de la Calzada (Domingo García), religious | Spain | 1109 |
| Blessed Juty z Chełmży, religious |  Poland | 1260 |
| Blessed Imelda (Maria Maddalena Lambertini), religious | Italy | 1333 |
| Blessed Joana de Portugal, religious |  Portugal | 1490 |
| Blessed Michał Rapacz, priest | Poland | 1946 |
| Blessed Ejëll Deda, priest |  Albania | 1948 |
| Blessed Dedë Malaj, priest | Albania | 1959 |
| Blessed Lucien Galan, priest | Laos | 1968 |
| Blessed Thomas Khampheuane Inthirath, layperson | Laos | 1968 |
| May 13 |
| Saint Servais de Tongres, bishop |  Belgium | 384 |
| Saint John the Hesychast (Giovanni Esicasta), archbishop |  Turkiye | 558 |
| Saint Agnès de Poitiers, abbess | France | 588 |
| Blessed Gerardo Mecatti, religious | Italy | 1242 |
| Saint Gemma di Goriano Sicoli, layperson | Italy | 1426 |
| Blessed Albertin-Marie Maisonade, religious | France | 1799 |
| Blessed Dominique-Marie (Jan Chrysostom Zavřel), priest | France | 1799 |
| Blessed Maturin-Marie Pitri, religious | France | 1799 |
| Blessed Modeste-Marie Burgen, religious | France | 1799 |
| Saint André-Hubert Fournet, priest | France | 1834 |
| Blessed María de la Concepción Barrecheguren y García, layperson | Spain | 1927 |
| Blessed Jean Duthu, layperson | France | 1945 |
| May 14 |
| Saint Corona, layperson | Turkiye | 171 |
| Saint Victor, layperson | Turkiye | 171 |
| Saint Gal de Clermont, bishop | France | 551 |
| Saint Carthage of Lismore, bishop |  Ireland | 637 |
| Blessed Gil Rodrigues de Valadares, priest | Portugal | 1265 |
| Blessed Simèon-Marie (Ignace-Alexandre-Joseph Cardon), priest | France | 1799 |
| Blessed Candida Jeong Bok-hye (정복혜 칸디다 / 鄭福惠), layperson |  South Korea | 1801 |
| Blessed Carolus Jeong Cheol-sang (정철상 가롤로 / 丁哲祥), layperson | South Korea | 1801 |
| Blessed Lucia Yun Un-hye (윤운혜 루치아 / 尹雲惠), layperson | South Korea | 1801 |
| Blessed Petrus Choe Pil-je (최필제 베드로 / 崔必悌), layperson | South Korea | 1801 |
| Blessed Thaddeus Jeong In-hyeok (정인혁 타데오 / 鄭麟赫), layperson | South Korea | 1801 |
| Saint Théodore (Anne-Thérèse Guérin), religious |  USA | 1856 |
| Saint Michel Garicoïts, priest | France | 1863 |
| Saint Maria Domenica Mazzarello, religious | Italy | 1881 |
| May 15 |
| Saint Primiano, layperson | Italy | 303 |
| Saint Duchonna, abbot | Ireland | 726 |
| Saint Isidore the Farm Labourer (Isidro de Merlo y Quintana), layperson | Spain | 1130 |
| Blessed André Abellon, priest | France | 1450 |
| Blessed Maddalena Albrici, abbess | Italy | 1465 |
| Blessed Joan Montpeó Masip, layperson | Spain | 1938 |
| Blessed Elżbieta od Ukrzyżowania Pana Jezusa (Róża Czacka), religious | Poland | 1961 |
| May 16 |
| Saint Casto, layperson | Italy | 303 |
| Saint Firmiano, layperson | Italy | 303 |
| Saint Restitude, layperson |  Tunisia | 304 |
| Saint Ercolano, layperson | Italy | 500 |
| Saint Flaviano, layperson | Italy | 500 |
| Saint Pellegrino, layperson | Italy | 500 |
| Saint Brendan of Clonfert, bishop | Ireland | 577 |
| Saint Honoré d’Amiens, bishop | France | 600 |
| Saint Gens de Beaucet, religious | France | 1127 |
| Saint Ubaldo Baldassini, bishop | Italy | 1160 |
| Saint Simon Stock, priest | England | 1265 |
| Saint Andrzej Bobola, priest | Poland | 1657 |
| Blessed Zosimo Brambat, religious | France | 1799 |
| Blessed Michał Woźniak, priest | Poland | 1942 |
| Blessed Vitalii (Volodomyr Bairak / Володимир Віталій Байрак), religious |  Ukraine | 1946 |
| Blessed Vladimir Ghika, priest |  Romania | 1954 |
| May 17 |
| Saint Paschal Baylon (Pascual Baylón Yubera), religious | Spain | 1592 |
| Blessed Bartholomeus Baba Han’Emon (バルトロマイ 馬場 半右衛門), layperson |  Japan | 1627 |
| Blessed Ioachim Mine Sukedayū (ジョアキム 峰 助大夫), layperson | Japan | 1627 |
| Blessed Ioannes Matsutake Chōzaburō (ヨハネ 松竹 庄三郎), layperson | Japan | 1627 |
| Blessed Ludovicus Furue Sukeemon (ルドビコ 助右衛門), layperson | Japan | 1627 |
| Blessed Ludovicus Hayashida Sōka (ルドビコ 林田 宗可), layperson | Japan | 1627 |
| Blessed Magdalena Hayashida (マグダレナ 林田), layperson | Japan | 1627 |
| Blessed Maria (マリア), layperson | Japan | 1627 |
| Blessed Paulus Hayashida Mohyōe (パウロ 林田 茂兵衛), layperson | Japan | 1627 |
| Blessed Paulus Nishida Kyūhachi (パウロ 西田 休巴), layperson | Japan | 1627 |
| Blessed Paulus Onizuka Magoemon (パウロ 鬼塚 孫右衛門), layperson | Japan | 1627 |
| Saint Petrus Liu Wenyuan (劉文元．伯鐸), layperson |  China | 1834 |
| Saint Giulia Salzano, religious | Italy | 1929 |
| Blessed Antonia Mesina, layperson | Italy | 1935 |
| Blessed Ivan Ziatyk (Іван Зятик), priest |  Russia | 1952 |
| May 18 |
| Saint Venanzio di Camerino, layperson | Italy | 250 |
| Saint John I, pope | Italy | 526 |
| Saint Eric IX (Erik Jedvardsson), layperson |  Sweden | 1160 |
| Blessed Burkard von Beinwil, priest |  Switzerland | 1192 |
| Blessed Guillaume de Toulouse, priest | France | 1369 |
| Saint Felice da Cantalice (Felice Porri), religious | Italy | 1587 |
| Saint Thomas Son Cha-sŏn (손자선 토마스 / 孫多瑪斯), layperson | South Korea | 1866 |
| Blessed Blandine (Maria Magdalena Merten), religious |  Germany | 1918 |
| Blessed Marcin (Jan Oprządek), religious | Germany | 1942 |
| Blessed Stanisław Kubski, priest | Poland | 1942 |
| May 19 |
| Saint Hadulf de Cambrai, bishop | France | 728 |
| Saint Dunstan, archbishop | England | 988 |
| Blessed Umiliana de’ Cerchi, religious | Italy | 1246 |
| Saint Celestine V, pope | Italy | 1296 |
| Saint Yves Hélory de Kermartin, priest | France | 1303 |
| Blessed Agostino Novello, religious | Italy | 1309 |
| Blessed Juan Lorenzo de Cetina, priest | Spain | 1397 |
| Blessed Pedro de Dueñas, religious | Spain | 1397 |
| Blessed Peter Wright, priest | England | 1651 |
| Saint Teofilo da Corte (Biagio Arrighi), priest | Italy | 1740 |
| Saint Crispin of Viterbo (Crispino da Viterbo / Pietro Fioretti), religious | Italy | 1750 |
| Blessed Jacques-Louis de Besançon (Jean-Baptiste-Xavier Loir), priest | France | 1794 |
| Blessed Raphaël-Louis (Firinga Rafiringa), religious |  Madagascar | 1919 |
| Saint Maria Bernarda Bütler, religious |  Colombia | 1924 |
| Blessed Primitivo de Villamizar (Lucinio Fontanil Medina), religious | Spain | 1937 |
| Blessed Giuseppina “Pina” Suriano, religious | Italy | 1950 |
| May 20 |
| Blessed Guido della Gherardesca, religious | Italy | 1140 |
| Saint Bernardine of Siena (Bernardino da Siena / Bernardino degli Albizzeschi), priest | Italy | 1444 |
| Blessed Colomba da Rieti (Angelella Guadagnoli), layperson | Italy | 1501 |
| Saint Protasius Chŏng Kuk-bo (정국보 프로타시오 / 丁玻羅大削), layperson | South Korea | 1839 |
| Blessed Josepha (Hendrina Stenmanns), religious |  Netherlands | 1903 |
| Saint Arcangelo Tadini, priest | Italy | 1912 |
| Blessed María Crescencia (María Angélica Pérez), religious |  Chile | 1932 |
| Blessed José Pérez Fernández, layperson | Spain | 1938 |
| Blessed Rafael García Torres, layperson | Spain | 1938 |
| Blessed Tomás Valera González, layperson | Spain | 1938 |
| Blessed Anastazy (Jakub Pankiewicz), priest | Germany | 1942 |
