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Pope Leo XIV -

Robert Prevost recently became the 267th pope and the first North American to become the leader of the Catholic Church. Pope Leo XIV is 69, and so was Pope Urban VII, who was elected in 1590.

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Pope Pius X -

Pope Pius X, who is now venerated as a saint, was 68 when he was elected in 1903. Another pope elected at the same age was Innocent VII, who became the pontiff in 1404.

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Pope Boniface III -

Pope Boniface III was one of six popes to be elected at the age of 67. The others were Gregory XV, Pius VIII, Clement IX, Nicholas III, and Leo XIII.

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Pope Donus -

There are six 66-year-old popes in the history of the Catholic Church. The youngest was Pope Donus, who was elected in 676, and the oldest (by six months) was John XXI. The other popes of the same age are Hadrian V, Honorius III, Paul III, and Urban IV.

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Pope Clement XIII -

Pope Clement XIII was 65 when he assumed the role of pontiff in 1758. Other popes who were elected at age 65 include popes Innocent XI, Gregory XVI, Benedict XIV, Paul VI, John Paul I, Urban III, and Innocent XIII.

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Pope Pius III -

Francesco Todeschini was elected Pope Pius III in 1503. He was 64. Other popes appointed at the same age include Pius XI, Honorius II, and Boniface VIII.

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Pius XII -

Pius XII was the head of the Catholic Church during World War II. He was elected in 1939 at the age of 63. He was, however, not the only pope to have ever been elected at that age. Others include Leo XII, Sixtus V, Clement XIV, and Benedict XI.

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Pope Gregory III -

Pope Gregory III was elected in 731 at the age of 62. Other pontiffs who were elected at the same age include popes Julius III, Hadrian VI, and Zacharias.

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Pope Alexander VI -

Roderic Llançol i de Borja became Pope Alexander VI in 1492. He was 61. There are four other popes who were elected at the same age. They are Gregory X, Damasus I, Celestine IV, and Pius V.

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Benedict IV -

Benedict IV was elected in 900. He was 60 years old at the time. So far, the Catholic Church has had six popes elected at age 60. The other five are Eugene III, Urban VI, Nicholas IV,  Victor III, and Pius IV.

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Pope Martin I -

Martin I, also known as Martin the Confessor, became the pontiff in 649. He was 59. Popes Pelagius II, Alexander III, Benedict XV, and Julius II were the same age.

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John Paul II -

John Paul II became the pontiff in 1978, at age 58. Other popes elected at the same age include Boniface IV, John IX, Nicholas I, Leo V, Celestine II, and Pope Linus.

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Clement I -

Clement I was appointed when he was 57. The first of the Apostolic Fathers of the Church is one of 11 popes who were elected at age 57. The other are Sixtus IV, Leo IV, Pius VI, Gregory IX, Paul, Vitalian, Pius VII, Sisinnius, Theodore II, and Clement III.

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Pope Conon -

Pope Conon became the head of the Church in 686, aged 56, but died shortly after in 687. He was not the only man to become pope at the age of 56. Others include Gelasius II, Alexander VII, and Silverius.

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Pope Cletus -

Pope Cletus, or Anacletus, was appointed in the year 80, at age 55. Other popes elected at age 55 include Urban VIII, Gregory XIV, and Clement VIII.

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Pope Sergius II -

Pope Sergius II became the pontiff in 844, at the age of 54. His papacy lasted three years, until his death in 847. Other 54-year-old popes include Pius IX, Sylvester II, John X, Hadrian III, Hadrian IV, and Benedict XII.

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Pope Urban II -

Pope Urban II, also known as Odo of Châtillon or Otho de Lagery, was appointed in 1088. He was 53. The Catholic Church has had other popes elected at the same age, namely Gregory VII, Marcellus I, John IV, Severinus, and Marcellus II.

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Pope Innocent V -

Pope Innocent V is one of eight clergymen who became pope at the age of 52. The others were popes Clement VI, Innocent VIII, Paul V, Urban V, Pius II, John VIII, and Marinus I.

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Pope Pelagius I -

Pope Pelagius I's papacy began in 556 and ended in 561. Pelagius I was 51 when he was elected pope. Two other popes assumed the role at the same age: Adeodatus II and Clement XI.

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Pope Benedict I -

Pope Benedict I was elected in 575, at the age of 50. Though he was not the first one appointed at the age of 50. Indeed, another pontiff was appointed at the same age back in 384: Pope Siricius.

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Pope Lucius II -

Pope Lucius II was 49 when he became the highest authority in the Church in 1144. Other popes elected at the same age include John XIX, Nicholas V, Benedict V, Paschal II, and Martin V.

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Pope Innocent II -

Innocent II was pope from 1130 to 1143. He was appointed at age 48, and so were popes Eugene IV, Innocent IV, Lando, Damasus II, Stephen III, and Leo VIII.

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Pope Paul II -

Only three pontiffs were elected at the age of 47. One of them was Pope Paul II, in 1464. The other two were popes Romanus and Valentine.

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Pope Leo IX -

Bruno von Egisheim-Dagsburg became Pope Leo IX in 1049, at the age of 46. Other pontiffs elected at the same age include Anastasius III, Gregory II, Stephen VI, and Stephen IV.

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Pope Adeodatus I -

Pope Adeodatus I, or Deusdedit, became pope in 615. He was 45. The Church has appointed other 45-year-old pontiffs, including Sylvester III, Gregory VI, Clement VII, Benedict III, Stephen V, and Leo III.

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Pope Sergius III -

Pope Sergius III became the ruler of the Papal States in 904, at the age of 44. Two other popes were elected at the same age: popes Constantine and Eugene II.

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Pope Alexander II -

Anselm of Baggio became Pope Alexander II in 1061. He was one of two popes elected at age 43. The other one was Pope Boniface V, in 618.

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Pope Paschal I -

Pope Paschal I was elected in 817, when he was 42. The only other pope appointed at the same age was Sixtus III in 432.

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Pope John III -

The 61st Pope of the Catholic Church was elected in 561. He was 41 at the time. Other 41-year-old pontiffs include Clement II, Clement V, and Gregory XI.

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Pope Honorius I -

Pope Honorius I was the only pontiff elected at the age of 40. His papacy began in 625 and ended with his death in 638.

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Pope Sergius IV -

Sergius IV is one of two popes elected at the age of 39. Sergius IV became pontiff in 1009, and Boniface IX in 1389.

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Pope Innocent III -

Only two men became popes at the age of 38: Pope Stephen II in 752, and Pope Innocent III (pictured) in 1198.

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Pope Sergius I -

There have been quite a few popes elected at the age of 37. One of them was Sergius I, in 683. Other popes include Vigilius, Leo X,  Stephen IX (or X), and Gregory IV.

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Pope Victor II -

Gebhard von Dollnstein-Hirschberg became Pope Victor II in 1054. He's the only man in the history of the Church to have been elected pontiff at the age of 36.

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Pope Theodore I -

Pope Theodore I was elected in 642, at 32 years old. The only other pope to be elected at age 32 was Benedict VIII in 1012.

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Pope Benedict VIII -

Pope Benedict VIII became bishop of Rome and ruler of the Papal States in 1012. Remarkably, he was only 22.

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Pope John XI -

Pope John XI is said to have been around 20 when he became pope in 931!

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Pope Benedict IX -

Teofilatto di Tuscolo is the only person ever to become pope more than once. Benedict IX was about 20 when he was first elected.

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Pope John XII -

And here we have our first, and only, teen pope! Pope Benedict IX is usually quoted as being the youngest pope, but Pope John XII may have been about 18 when he became the pontiff in 955.

Sources: (Catholic-Hierarchy) (Oldest.org) (Aleteia) 

See also: The oldest popes to hold office

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