This is the list of 10 shortest-reigning popes.

The number of calendar days includes part days, so if a pope died the day after he was consecrated, this would count as having reigned for two calendar days.

1. Urban VII (September 15–September 27 , 1590): reigned for 13 calendar days, died before consecration.
2. Boniface VI (April, 896): reigned for 16 calendar days
3. Celestine IV (October 25–November 10, 1241): reigned for 17 calendar days, died before consecration.
4. Sisinnius (January 15–February 4, 708): reigned for 21 calendar days
5. Theodore II (December, 897): reigned for 20 calendar days
6. Marcellus II (April 9–April 30, 1555): reigned for 22 calendar days
7. Damasus II (July 17–August 9, 1048): reigned for 24 calendar days
8. Pius III (September 22–October 18, 1503): reigned for 27 calendar days
9. Leo XI
   
   
   
   (April 1–April 27, 1605): reigned for 27 calendar days
10. Benedict V (May 22–June 23, 964): reigned for 33 calendar days.

John Paul I (August 26 – September 28, 1978) died on the 33rd day after his election, having reigned for 34 calendar days.

Stephen (March 23 – March 26, 752), died of apoplexy three days after his election, and before his consecration. Once counted as Stephen II, he was removed in 1961 from the Vatican's official list of popes. This has caused difficulties in enumerating Popes named Stephen.

See also

• Year of Three Popes
• List of 10 longest-reigning popes
• List of popes
• List of ages of popes

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