| Giovanni Nasalli Rocca di Corneliano | Archbishop of Bologna | Kingdom of Italy
20 December 1923Pius created two Italian cardinals on 20 December 1923, both longtime officials in the Roman Curia.
| Name | Title when named cardinal | Country | | Evaristo Lucidi | Secretary of the Supreme Tribunal of the Apostolic Signatura | Kingdom of Italy
24 March 1924Pius named a pair of American archbishops cardinals on 24 March 1924. This brought the membership of the College of Cardinals to a total of 66, 33 Italians and 33 non-Italians: seven French, seven German, four American, four Spanish, two English, two Polish, and one each of Belgian, Hungarian, Irish, Portuguese, Brazilian, Dutch, and Canadian.
| Name | Title when named cardinal | Country | | George Mundelein | Archbishop of Chicago | United States|1912 Pius named a pair of Spanish archbishops cardinals on 30 March 1925. Both received their red birettas in Madrid from King Alfonso in a ceremony that included an address by the King in Latin. The previous consistory had left the college with 33 Italians and 33 non-Italians. The deaths of the Irish Michael Logue on 19 November and the Italian Oreste Giorgi on 24 December maintained that balance. This consistory gave the non-Italians a majority of 34 to 32.
| Name | Title when named cardinal | Country | | Eustaquio Ilundain y Esteban | Archbishop of Sevilla | 
14 December 1925Pius named four cardinals on 14 December 1925, three Italians, and an Irish archbishop. He made an exception to the 1917 Code of Canon Law that prohibited cardinals from being closely related to one another. The new cardinal Enrico Gasparri was the nephew of Cardinal Secretary of State Pietro Gasparri. The previous consistory had left the non-Italians with a 34 to 32 majority that had fallen by one with the death of Canadian Louis-Nazaire Bégin on 18 July 1925. This consistory restored the Italian majority once again.
| Name | Title when named cardinal | Country | | Bonaventura Cerretti | Apostolic Nuncio to France | Kingdom of Italy Pius named two new cardinals on 21 June 1926, both Italian curia officials.
| Name | Title when named cardinal | Country | | Luigi Capotosti | Secretary of the Sacred Congregation of the Sacraments | Kingdom of Italy
20 December 1926On 6 December 1926, Pius announced he would create two cardinals at a consistory on 20 December. Both were Italians, one the Bishop of Turin and the other a papal nuncio.
| Name | Title when named cardinal | Country | | Lorenzo Lauri | Apostolic Nuncio to Poland | Kingdom of Italy
20 June 1927On 2 May 1927, Pius announced he would create two cardinals at a consistory on 20 June. Both were Archbishops, one Belgian and one Polish.
| Name | Title when named cardinal | Country | | Jozef-Ernest van Roey | Archbishop of Mechelen | Belgium At this consistory Pius announced that he had accepted the resignation of French Jesuit theologian Louis Billot from the College of Cardinals, as reported in September. It was the only resignation from the college in the 20th century. Pius X had named him a cardinal in 1911. With the creation of five non-Italian cardinals at this consistory, the college again reached a numerical balance with 33 Italians and 33 non-Italians.
| Name | Title when named cardinal | Country | | Alexis Lépicier | Prior General Emeritus of the Servites |  The deaths of several Italians altered the balance in the college by 31 March 1929 to 26 Italians and 33 non-Italians. It was rumored that Pius would appoint more non-Italians once the Holy See reached an agreement with the government of Italy about the legal status of the Vatican City State. Pius named Alfredo Schuster, an Italian of German-Swiss heritage, Archbishop of Milan and made him a cardinal on 15 July 1929.
| Name | Title when named cardinal | Country | | Alfredo Ildefonso Schuster | Archbishop of Milan | Kingdom of Italy
16 December 1929In advance of this consistory, New York Times correspondent Arnaldo Coresi speculated whether Pius would restore an Italian majority in the College of Cardinals in deference to Italian sensibilities following the ratification of the Lateran Treaty between Italy and the Holy See earlier in the year which the election of a non-Italian pope might disturb. The contrary argument was that creating a non-Italian majority in the college would demonstrate papal independence and allay fears that the Treaty gave Italy undue influence in Church affairs. Pius divided his appointments evenly: three from Italy, and one each from France, Ireland, and Portugal. The consistory left the Italians in the minority, with 30 out of 63 members.
| Name | Title when named cardinal | Country | | Manuel Gonçalves Cerejeira | Patriarch of Lisbon | efn|Elected as Pope Pius XII
30 June 1930At this consistory Pius made three Italian officials of the Roman Curia, a Brazilian archbishop, and a French bishop cardinals. It left the college balanced between 31 Italians and 32 non-Italians.
| Name | Title when named cardinal | Country | | Sebastião da Silveira Cintra | Archbishop of São Sebastião do Rio de Janeiro | |1889 After creating cardinals at thirteen consistories in less than eight years, Pius waited longer than ever before to hold his next consistory in March 1933, more than two years and eight months. He nevertheless brought the membership of the college from 52 to just 58 by naming six cardinals: four Italians, an Austrian, and a Canadian. This gave the Italians a majority in College for the first time in several years. Pius announced he was making two additional prelates cardinals but withheld their names, which the press speculated meant they were too important in their present posts to be transferred from positions not normally held by a cardinal.
| Name | Title when named cardinal | Country | | Angelo Dolci | Apostolic Nuncio to Romania | Kingdom of Italy
Cardinals ''in pectore''| Name | Title when named cardinal | Country | Revealed as Cardinal | | Federico Tedeschini | Apostolic Nuncio to Spain | Kingdom of Italy
16 December 1935On 21 November 1935, Pope Pius named 18 prelates he planned to make cardinals at a consistory on 16 December. Twelve were Italians and six came from other countries. One of them was the first Eastern Rite patriarch to enter the college since 1895. It was the first consistory to create as many as 18 cardinals since Pius X did so in 1911. Pius also revealed the names of two he added secretly in 1933. Four of the new cardinals, papal nuncios unable to attend the ceremony, participated in the next reception of new cardinals in June 1936. As was traditional for the Apostolic Nuncio to Spain, Tedeschini, created in pectore at the previous consistory, received his red biretta from Spanish President Alcalá Zaomora, head of "one of the most officially anti-clerical nations in the world". With this consistory the college grew to 68 members, 37 of them Italians.
| Name | Title when named cardinal | Country | | Ignatius Gabriel I Tappouni | Patriarch of Antioch of the Syriacs | 
15 June 1936Both new cardinals had spent years in various positions at the Vatican Library, where Pius himself had worked early in his career.
| Name | Title when named cardinal | Country | | Giovanni Mercati | Prefect of the Vatican Apostolic Library | Kingdom of Italy Pius' health had been so poor that on 21 December 1936 the U.S. weekly magazine Life published picture of the 66 cardinals then living with the advice: "Disregard non-Italians and old men: somewhere among the others is the face of the next Pope." A year later, Pius reminded those assembled at a consistory held in December 1937 that it might be his last. With the appointment of 3 Italians and 2 non-Italians at his last consistory, Pius increased the Italians to 39 out of 60 members of the College of Cardinals.
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