List of state leaders in 1666

This is a list of heads of state, heads of governments, and other rulers in the year 1666.

Africa

• Kingdom of Bamum – Ngouloure (1629–1672)
• Kingdom of Dahomey – Houegbadja (1645–1685)
• Ethiopian Empire – Fasilides (1632–1667)

Asia

• Ayutthaya Kingdom (Siam) – Narai (1656–1688)
• China (Qing dynasty) - Kangxi Emperor (1662–1722)
• Kingdom of Coorg - Muddu Raja I (1633-1687)
• Empire of Japan –
  • Monarch – Reigen (1663–1687)
  • Tokugawa shogunate – Tokugawa Ietsuna (1651–1680)
  • Ryukyu Kingdom –
    • Monarch – Shō Shitsu (1648–1668)
    • Regent – Shō Shōken, Sessei (1666–1673)
• Joseon (Korea) – Hyeonjong (1659–1674)
• Kahlur – Bhim Chand, Raja of Kahlur (1665–1692)
• Mughal Empire – Aurangzeb (1658–1707)
• Taiwan (Kingdom of Tungning) - Zheng Jing (1662–1681)
• Sultanate of Tidore – Saifuddin (1657–1689)

Europe

• Kingdom of Denmark–Norway – Frederick III (1648–1670)
• Kingdom of England – Charles II (1660–1685)
• Kingdom of France – Louis XIV (1643–1715)
• Holy Roman Empire – Leopold I (1658–1705)
• Ottoman (Turkish) Empire
  • Sultan - Mehmed IV, the Hunter, Ottoman Sultan (1648–1687)
  • Grand Vizier - Köprülü Fazıl Ahmed Pasha (1661–1676)
• Papal States – Pope Alexander VII (1655–1677)
• Polish–Lithuanian Commonwealth – Jan II Kazimierz Vasa (1648–1668)
• Kingdom of Portugal and the Algarves - Afonso VI (1656–1683)
• Tsardom of Russia – Alexei I of Russia
• Duchy of Savoy – Charles Emmanuel II (1638–1675)
• Kingdom of Spain – Charles II (1665–1700)
• Kingdom of Sweden – Charles XI (1660–1697)
• Grand Duchy of Tuscany – Ferdinando II de' Medici (1621–1670)
• 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

• Persia – Abbas II, Shah of Persia
• Sultanate of Morocco – Al-Rashid (1666–1672)