List of 10 shortest reigning Popes

1. Pope Urban VII (September 15 - September 27, 1590): 12 days
2. Pope Boniface VI (April, 896): 15 days
3. Pope Celestine IV (October 25 - November 10, 1241): 16 days
4. Pope Sisinnius[?] (January 15 - February 4, 708): 20 days
5. Pope Theodore II (December, 897): 20 days
6. Pope Marcellus II (April 10 - May 1, 1555): 21 days
7. Pope Damasus II (July 17 - August 9, 1048): 23 days
8. Pope Pius III (September 22 - October 18, 1503): 26 days
9. Pope Leo XI (April 1 - April 27, 1605): 26 days
10. Pope Benedict V (May 22 - July 4, 964): 32 days

Bubbling under - Pope John Paul I (October 17, 1912 - September 28, 1978) died on the 33rd day after his election.

See also: List of 10 longest reigning Popes