List of shortest-reigning monarchs Less than a month Less than a month

| Name_ | Country | Reign_began | Reign_ended | Length_ |
|---|---|---|---|---|
| Emperor Napoleon II | Emperor of the French | 22 June 1815 | 7 July 1815 | 16 days |
| Pope Urban VII | Holy See | 15 September 1590 | 27 September 1590 | 13 days |
| King Lodewijk II | Holland | 1 July 1810 | 13 July 1810 | 12 days |
| Emperor Puyi | China | 1 July 1917 | 12 July 1917 | 12 days |
| Queen Jane | England and Ireland | 10 July 1553 | 19 July 1553 | 9 days |
| Emir Saad Al-Abdullah Al-Salim Al-Sabah | Kuwait | 15 January 2006 | 24 January 2006 | 9 days |
| King Henry V | King of France | 2 August 1830 | 9 August 1830 | 7 days |
| King Thong Lan | Ayutthaya Kingdom | 1370 | 1370 | 7 days |
| Pharaoh Hor I | Egypt | c.1775 BC | c.1775 BC | 7 days |