List of state leaders in 1645
1644 state leaders - Events of 1645 - 1646 state leaders - State leaders by year
Africa
Asia
Europe
- England - Charles I, King of England (1625–1649)
- France - Louis XIV, King of France (1643–1715)
- Holy Roman Empire - Ferdinand III, Holy Roman Emperor (1637–1657)
- Bremen, Prince-Archbishopric -
- Frederick II (later Frederick III of Denmark), Lutheran Administrator of the Prince-Archbishopric of Bremen (1635–1645)
- Archduke Leopold William of Austria, rivalling Catholic Administrator of the Prince-Archbishopric of Bremen (1635–1645)
- Halberstadt, Prince-Bishopric - Archduke Leopold William of Austria, Catholic Administrator of the Prince-Bishopric of Halberstadt (1628–1648)
- Lorraine - Nicholas Francis, Duke of Lorraine (1634–1661)
- Magdeburg, Prince-Archbishopric - Augustus, Duke of Saxe-Weissenfels, Lutheran Administrator of the Prince-Archbishopric of Magdeburg (1638–1680)
- Olomouc, Prince-Bishopric - Archduke Leopold William of Austria, Catholic Administrator of the Prince-Bishopric of Olomouc (1637–1662)
- Passau, Prince-Bishopric - Archduke Leopold William of Austria, Catholic Administrator of the Prince-Bishopric of Passau (1625–1662)
- Strasbourg, Prince-Bishopric - Archduke Leopold William of Austria, Catholic Administrator of the Prince-Bishopric of Strasbourg (1626–1662)
- Ottoman (Turkish) Empire - İbrahim, Ottoman Sultan (1640–1648)
- Papal States - Pope Innocent X (1644–1655)
- Polish-Lithuanian Commonwealth - Ladislau IV, King of Poland (1632–1648)
- Russia -
- United Provinces
- Estates of Friesland, Groningen, Guelders, Holland, Overijssel, Utrecht, Zeeland (1581–1795)
- Stadtholder - Frederick Henry, Prince of Orange, Stadtholder of Gelre, Holland, Utrecht and Zeeland(1625–1647).