List of state leaders in 1804
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Africa
- Ethiopia Kaiser: Egwala Seyon (1801-1818)
- Burundi King: Ntare Rugamba IV (ca. 1796 -ca 1850. )
- Dahomey King: Adandozan (1797-1818)
- Morocco ( Alawites Dynasty ) Sultan Moulay Sulaiman (1792-1822)
- Rwanda King: Mutara II 1802-1853
- Tunisia ( Husainiden Dynasty ) Sultan: Hammuda Bey (1782-1814)
America
Anglo America
- United States of America Heads of state and head of government: President Thomas Jefferson (1801-1809)
Caribbean
- Haiti (since January 1, disputed) Ruler: Emperor James I (September 22, 1804-1806 )
Latin America
- Viceroyalty of New Granada Viceroy Antonio Amar y Borbón (1803-1810)
- Viceroyalty of New Spain Viceroy José de Iturrigaray (1803-1808)
- Viceroyalty of Peru Viceroy: Gabriel de Avilés y del Fierro (1801-1806)
- Viceroyalty of the Río de la Plata Viceroy: Joaquín del Pino Sánchez de Rojas (1801-1804)
- Rafael de Sobremonte (1804-1807)
Asia
- Abu Dhabi Sheikh: Shakhbut 'm Dhiyab (1793-1816)
- Afghanistan King: Shoja Shah Durrani (1803-1809)
- China ( Qing Dynasty ) Emperor Jia Qing (1796-1820)
- Japan Kaiser: Kokaku (1780-1817)
- Shogun ( Tokugawa ): Tokugawa Ienari ( 1786-1837 )
- Korea ( Joseon ) King: Sunjo (1800-1834)
- Persia ( Qajar dynasty ) Shah: Fath Ali (1797-1834)
- Thailand King of Thailand: Rama I (1782-1809)
Europe
- Andorra Co - Prince: King of France: vacant
- Bishop of Urgell: Francesc Antoni de la Dueña y Cisneros (1797-1816)
- Denmark and Norway King Christian VII (1766-1808)
- Registrar: Christian Günther von Bernstorff (1797-1810)
- France Consul Napoléon Bonaparte (1799-1804)
- Emperor Napoleon I Emperor of France (1804-1815)
- Holy Roman Empire King and Emperor Franz II (1792-1806)
- Bohemia and Austria: King and Archduke Franz Joseph Karl (1792-1835, from 4 August as Emperor Francis I )
- Brandenburg Elector Friedrich Wilhelm III. (1797-1840)
- Baden Elector Karl Friedrich (1738-1811), since 1806 the Grand Duke
- Bavaria: the Elector Maximilian IV Joseph (1799-1825), king from 1806
- Brunswick- Lüneburg ( Hanover ): Elector Georg Wilhelm Friedrich ( 1760-1820 )
- Hesse -Darmstadt: Landgraf Louis X (1790-1806), since 1806 the Grand Duke
- Hesse -Kassel: Elector Wilhelm I ( Hesse -Cassel ) ( 1785-1821 ), since 1803 the Elector, in exile 1806-1813
- Oldenburg: Duke Peter Friedrich Ludwig (1785-1829)
- Regensburg: Elector Karl Theodor von Dalberg (1803-1810)
- Saxony Elector Friedrich August III. (1763-1827), king from 1806
- Salzburg: Elector Ferdinand III. (1803-1805)
- Württemberg: Elector Frederick I (1797-1816), king from 1806
- Church State Pope Pius VII (1800-1823)
- Naples King Ferdinand IV (1759-1806)
- Ottoman Empire Sultan Selim III. (1789-1807)
- Portugal Queen ( incapacitated ): Mary I ( 1777-1816 )
- Regent: John VI. (1792-1816)
- Prussia King Friedrich Wilhelm III. (1797-1840)
- Russia Tsar Alexander I. (1801-1825)
- Sardinia King Victor Emmanuel I (1802-1821)
- Savoy Duke: Charles Emmanuel IV (1796-1819)
- Sweden King Gustav IV Adolf (1792-1809)
- Sicily King Fernando I (1759-1825)
- Spain King Charles IV (1788-1808)
- Hungary King Francis I (1792-1835)
- United Kingdom King: George III. (1760-1820)
- Prime Minister Henry Addington (1801-1804)
- Prime Minister William Pitt the Younger (1783-1801, 1804-1806)
Oceania and the Pacific
- Hawaii King Kamehameha I (1795-1819)