List of state leaders in 1604
1603 state leaders - Events of 1604 - 1605 state leaders - State leaders by year
Africa
Asia
Europe
- Kingdom of Denmark - Christian IV (1588–1648)
- Kingdom of England - James I (1603–1625)
- Kingdom of France - Henry IV (1589–1610)
- Holy Roman Empire - Rudolf II (1576–1612)
- Moldavia - Ieremia Movilă, Voivode of Moldavia (August 1595 - May 1600 and September 1600–1606)
- Ottoman ( Turkish ) Empire - Ahmet I, Ottoman Sultan (1603–1617)
- Papal States - Pope Clement VIII (1592–1605)
- Polish–Lithuanian Commonwealth - Sigismund III Vasa (1587–1632)
- Russia - Boris Godunov, Tsar of Russia (1598–1605)
- Kingdom of Scotland - James VI (1567–1625)
- Kingdom of Spain - Philip III (1598–1621)
- Kingdom of Sweden - Charles IX (1599–1611)
- United Provinces
- Estates of Friesland, Groningen, Guelders, Holland, Overijssel, Utrecht, Zeeland (1581–1795)
- Stadtholder - Maurice of Nassau, Prince of Orange, Stadtholder of Gelre, Holland, Overijssel, Utrecht and Zeeland (1585–1625)
- Grand Pensionary of Holland - Johan van Oldebarnevelt (1586–1619)
- Republic of Venice - Marino Grimani, Doge of Venice (1595–1606)
Middle East and North Africa
North America