List of state leaders in 1666

1665 state leaders - Events of 1666 - 1667 state leaders - State leaders by year-----

See also:
*List of religious leaders in 1666
*List of colonial governors in 1666

Africa

*Dahomey - Houegbadja, King of Dahomey (1645-1685)
*Ethiopia - Fasilides, Emperor of Ethiopia (1632-1667)

Asia

* China (Qing Dynasty) - Kangxi, Emperor of China (1662-1722)
* Japan -
**Monarch - Reigen, Emperor of Japan (1663-1687)
**Shogun (Tokugawa) - Tokugawa Ietsuna, Shogun of Japan (1651-1680)
**Ryūkyū Kingdom -
***Monarch - Shō Shitsu, King of Ryūkyū (1648-1668)
***Regent - Shō Shōken, "Sessei" (1666-1673)
*Korea (Joseon Dynasty) - Hyeonjong, King of Joseon (1659-1674)
* Mughal Empire - Aurangzeb, Mughal Emperor (1658 - 1707)
* Taiwan (Dongning) - Zheng Jing, Ruler of Dongning (1662-1681)

Europe

* Denmark–Norway - Frederick III, King of Denmark (1648-1670)
* England - Charles II, King of England (1660-1685)
* France - Louis XIV, King of France (1643-1715)
* Holy Roman Empire - Leopold I, Holy Roman Emperor (1658-1705)
* Papal States - Alexander VII, Pope (1655-1677)
* Polish-Lithuanian Commonwealth - Jan II Kazimierz Vasa, King of Poland (1648-1668)
* Russia - Alexei I of Russia, Tsar of Russia
*Savoy - Charles Emmanuel II, Duke of Savoy (1638-1675)
* Spain - Charles II, King of Spain (1665-1700)
* Sweden - Charles XI, King of Sweden (1660-1697)
* United Provinces
**Estates of Friesland, Groningen, Guelders, Holland, Overijssel, Utrecht, Zeeland (1581-1795)
**Grand Pensionary of Holland - Johan de Witt (1653-1672)

Middle East and North Africa

* Ottoman Empire - Mehmed IV, Sultan of the Ottoman Empire (1648-1687)
* Persia - Abbas II, Shah of Persia
* Morocco - Al-Raschid, King of Morocco