List of heads of state 1800

Great Britain and Ireland
- Head of State: King George III. (1760–1801) (1801–1820 King of the United Kingdom, 1760–1806 Elector of Braunschweig-Lüneburg, 1814–1820 King of Hanover)
- Head of Government:
  - Prime Minister William Pitt the Younger (1783-1801, 1804-1806 )
  - Prime Minister Henry Addington (1801-1804)

Holy Roman Empire
- King and Emperor : Franz II. (1792–1806) (1792–1835 King of Bohemia, 1815–1835 King of Lombardo-Veneto, 1792–1797 1799–1800 Duke of Milan, 1792–1804 Archduke of Austria, 1804–1835 Emperor of Austria, 1792–1835 King of Hungary)
- Electoral College
  - Archbishopric of Cologne
    - Elector : Maximilian Franz of Austria (1784–1801) (1784–1801 Bishop of Münster, 1780–1801 Grand Master of the Teutonic Order)
  - Archbishopric Mainz
    - Elector : Friedrich Karl Joseph von Erthal (1774–1802) (1774–1802 Bishop of Worms)
  - Archbishopric Trier
    - Elector : Clemens Wenzeslaus of Saxony (1768–1801) (1768–1803 Bishop of Augsburg, 1763–1768 Bishop of Freising, 1763–1768 Bishop of Regensburg, 1787–1802 Provost of Ellwangen, 1768–1794 Abbot of Prüm)
  - Bavaria and Palatinate
    - Elector : Maximilian IV (1799–1806) (1806–1825 King of Bavaria, 1799–1806 Duke of Berg)
  - Kingdom of Bohemia
    - King : Franz II. (1792–1835) (1792–1806 Emperor, 1815–1835 King of Lombardy-Veneto, 1792–1797 1799–1800 Duke of Milan, 1792–1804 Archduke of Austria, 1804–1835 Emperor of Austria, 1792 –1835 King of Hungary)
  - Margraviate of Brandenburg
    - Elector : Friedrich Wilhelm III. (1797–1806) (1797–1840 King of Prussia)
  - Duchy of Brunswick-Lueneburg
    - Elector : George III. (1760–1803) (1760–1801 King of Great Britain and Ireland, 1801–1820 King of the United Kingdom, 1814–1820 King of Hanover)
  - Duchy of Saxony
    - Elector : Friedrich August I (1763–1806) (1806–1827 King of Saxony)
- spiritual imperial princes
  - Hochstift Augsburg
    - Bishop : Clemens Wenzeslaus of Saxony (1768–1803) (1768–1801 Archbishop of Trier, 1763–1768 Bishop of Freising, 1763–1768 Bishop of Regensburg, 1787–1802 Provost of Ellwangen, 1768–1794 Abbot of Prüm)
  - Bamberg Monastery
    - Bishop : Christoph Franz von Buseck (1795–1802)
  - Hochstift Basel
    - Bishop : Bishop: Franz Xaver von Neveu (1794–1803)
  - Prince Provost Berchtesgaden
    - Provost : Joseph Konrad von Schroffenberg-Mös (1780–1803) (1789–1802 / 03 Bishop of Freising, 1790–1802 / 03 Bishop of Regensburg)
  - Brixen monastery
    - Bishop : Karl Franz von Lodron (1791–1803)
  - Hochstift Chur (territory 1648 federal, bishop imperial class without immediate land)
    - Bishop : Karl Rudolf von Buol-Schauenstein (1793–1803)
  - Corvey Monastery
    - Bishop : Ferdinand von Lüninck (1794–1803)
  - Balleien of the Teutonic Order
    - Grand Master : Maximilian Franz of Austria (1780–1801) (1784–1801 Archbishop of Cologne, 1784–1801 Bishop of Münster)
  - Eichstätt Monastery
    - Bishop : Joseph von Stubenberg (1790–1802)
  - Prince Provost Ellwangen
    - Provost : Clemens Wenzeslaus of Saxony (1787–1802) (1768–1801 Archbishop of Trier, 1763–1768 Bishop of Freising, 1763–1768 Bishop of Regensburg, 1768–1794 Abbot of Prüm)
  - Hochstift Freising
    - Bishop : Joseph Konrad von Schroffenberg-Mös (1789–1802 / 03) (1790–1802 / 03 Bishop of Regensburg, 1780–1803 provost of Berchtesgaden)
  - Fulda Abbey
    - Bishop : Adalbert von Harstall (1789–1802)
  - Hildesheim Monastery
    - Bishop : Franz Egon von Fürstenberg (1789–1802) (1789–1802 Bishop of Paderborn)
  - Prince Abbey of Kempten
    - Abbot : Castolus Reichlin von Meldegg (1793–1803)
  - Constance monastery
    - Bishop : Karl Theodor von Dalberg (1799–1803) (Grand Duke of Frankfurt 1810–1813, Prince of Aschaffenburg 1803–1810, Prince of Regensburg 1803–1810, Archbishop of Mainz 1802–1803, Bishop of Worms 1802–1803)
  - Hochstift Lübeck (1555–1803 Protestant administrators)
    - Bishop : Peter Friedrich Ludwig von Oldenburg (1785–1803) (1785–1823 Regent of Oldenburg, 1823–1829 Duke of Oldenburg)
  - Liège Monastery
    - Bishop : Franciscus-Antonius de Méan (1792–1801)
  - Monastery of Münster
    - Bishop : Maximilian Franz of Austria (1784–1801) (1784–1801 Archbishop of Cologne, 1780–1801 Grand Master of the Teutonic Order)
  - Hochstift Osnabrück (1662–1802 alternating between Catholic and Lutheran bishops)
    - Bishop : Friedrich August von Hannover and Albany (1764–1802)
  - Paderborn Monastery
    - Bishop : Franz Egon von Fürstenberg (1789–1802) (1789–1802 Bishop of Hildesheim)
  - Passau bishopric
    - Bishop : Leopold Leonhard von Thun and Hohenstein (1796–1803)
  - Regensburg Monastery
    - Bishop : Joseph Konrad von Schroffenberg-Mös (1790–1802 / 03) (1789–1802 / 03 Bishop of Freising, 1780–1803 provost of Berchtesgaden)
  - Archbishopric Salzburg
    - Archbishop : Hieronymus von Colloredo (1772–1803)
  - Speyer Monastery
    - Bishop : Philipp Franz Wilderich Nepomuk von Walderdorf (1797–1802)
  - Strasbourg Monastery
    - Bishop : Louis René Édouard de Rohan-Guéméné (1779–1803)
  - Hochstift Trento
    - Bishop : Peter Michael Vigil von Thun and Hohenstein (1776–1800)
    - Bishop: Emanuel Josef Maria Peter von Thun-Hohenstein (1800–1803)
  - Hochstift Worms
    - Bishop : Friedrich Karl Joseph von Erthal (1774–1802) (1774–1802 Archbishop of Mainz)
  - Würzburg Monastery
    - Bishop : Georg Karl von Fechenbach (1795–1802)
- secular imperial princes
  - Stop
    - Anhalt-Bernburg
      - Prince : Alexius Friedrich Christian (Anhalt-Bernburg) (1796–1834) (from 1807 duke)
    - Principality of Anhalt-Dessau
      - Prince : Leopold III. Friedrich Franz (1751–1817) (1751–1758 under guardianship) (from 1807 duke)
    - Principality of Anhalt-Köthen
      - Prince : August Christian (1789–1812) (from 1806 Duke)
  - Arenberg
    - Duke : Ludwig Engelbert (1778–1803)
  - to bathe
    - Margrave : Karl Friedrich (1771–1803) (1738–1746 under guardianship) (1738–1771 Margrave of Baden-Durlach, 1803–1806 Elector of Baden, 1806–1811 Grand Duke of Baden)
  - Braunschweig-Wolfenbüttel
    - Duke : Karl Wilhelm Ferdinand (1780–1806)
  - Hessen-Darmstadt
    - Landgrave : Ludwig X. (1790–1830) (from 1806 Grand Duke)
  - Hessen-Kassel
    - Landgrave : Wilhelm IX. (1785–1806, 1814–1821) (elector from 1803)
  - Hohenzollern-Hechingen
    - Prince : Hermann (1798–1810)
  - Hohenzollern-Sigmaringen
    - Prince : Anton Aloys (1785–1831)
  - Liechtenstein
    - Prince : Alois I (1781–1805)
  - Lippe-Detmold
    - Count : Leopold I (1782–1802) (1782–1789, 1790–1794 under guardianship, until 1789 Count)
  - Mecklenburg
    - Mecklenburg-Schwerin
      - Duke : Friedrich Franz I (1785–1837) (Grand Duke from 1815)
    - Mecklenburg-Strelitz
      - Duke : Charles II (1794–1816) (Grand Duke from 1815)
  - Nassau
    - Ottonian line
      - Nassau-Diez
        Prince : Wilhelm V (1751–1806) (1751–1796 governor of the Netherlands)
    - Walramic line
      - Nassau-Usingen
        Prince : Karl Wilhelm (1775–1803)
      - Nassau-Weilburg
        Prince : Friedrich Wilhelm (1788–1816) (from 1806 in the Duchy of Nassau)
  - Oldenburg
    - Duke : Peter Friedrich Wilhelm (1785–1823) (under regency)
    - Regent: Peter Friedrich Ludwig von Oldenburg (1785–1823) (1785–1803 Bishop of Lübeck, 1823–1829 Duke of Oldenburg)
  - Austria
    - Archduke : Franz I (1792–1835) (1792–1806 Emperor, 1792–1835 King of Bohemia, 1815–1835 King of Lombardy-Veneto, 1792–1797 1799–1800 Duke of Milan, 1804–1835 Emperor of Austria, 1765 –1790 Grand Duke of Tuscany, 1792–1835 King of Hungary)
  - Pfalz-Neuburg and Pfalz-Sulzbach
    - Duke : Maximilian I Joseph (1799–1806) (1799–1806 Elector Palatinate-Bavaria, 1806–1825 King of Bavaria, 1799–1806 Duke of Berg, 1810–1816 Duke of Salzburg)
  - Reuss older line
    - Prince : Heinrich XI. (1778–1800) (1723–1768 Count of Reuss-Obergreiz, 1768–1778 Count of Reuss-Greiz)
    - Prince: Heinrich XIII. (18-1817)
  - Duchy of Saxony
    - Saxe-Coburg-Saalfeld
      - Duke : Ernst Friedrich (1764–1800)
      - Duke: Franz (1800–1806)
    - Saxe-Gotha-Altenburg
      - Duke : Ernst II (1772–1804)
    - Saxony-Hildburghausen
      - Duke : Friedrich (1780–1826) (1826–1834 Duke of Saxony-Altenburg)
    - Saxony-Meiningen
      - Duke : Georg I (Sachsen-Meiningen) (1763–1803) (1763–1782 under guardianship)
    - Saxe-Weimar-Eisenach
      - Duke : Karl August (1758–1828) (1758–1775 under guardianship, 1815–1828 Grand Duke)
  - Schwarzburg-Rudolstadt
    - Prince : Ludwig Friedrich II. (1793–1807)
  - Schwarzburg-Sondershausen
    - Prince : Günther Friedrich Carl I. (1794–1835)
  - Waldeck-Pyrmont
    - Prince : Friedrich Karl August (1763–1805) (1805–1812 Prince of Waldeck)
  - Württemberg
    - Duke : Friedrich II. (1797–1816) (1803–1806 elector, 1806–1816 king)
- other imperial estates (selection)
  - Ortenburg
    - Count : Joseph Carl Leopold Friedrich Ludwig (1787–1805) (1787–1801 under guardianship)
    - Regent: Christiane Louise zum Stein (1787–1801)
  - Reuss
    - Reuss younger line
      - Reuss-Ebersdorf
        Count : Heinrich LI. (1779–1822) (from 1806 Prince)
      - Reuss-Gera
        Count : Heinrich XXX. (1748–1802)
      - Reuss-Lobenstein
        Count : Heinrich XXXV. (1782–1805) (from 1790 Prince)
      - Reuss-Schleiz
        Count : Heinrich XLII. (1784-1818) (from 1806 Prince)
  - Schaumburg-Lippe
    - Count : Georg Wilhelm (1787–1860) (1787–1807 under guardianship, from 1807 prince)
    - Regent: Johann Ludwig von Wallmoden-Gimborn (1787–1807)

Italian states
- Papal States
  - Pope : Pius VII (1800–1823)
- Milan (1706–1800 to Austria) (1800 part of the Cisalpine Republic)
  - Duke : Emperor Franz II. ( 1792–1797 , 1799–1800) (1792–1806 Emperor, 1792–1835 King of Bohemia, 1815–1835 King of Lombardy-Venetia, 1792–1804 Archduke of Austria, 1804–1835 Emperor of Austria , 1765–1790 Grand Duke of Tuscany, 1792–1835 King of Hungary)
    - Governor : Luigi Cocastelli (1799–1800)
- Naples (1735–1806 personal union with Sicily)
  - King : Ferdinand I ( 1759–1799 , 1799–1806, 1815–1816 ) (King of Sicily 1759–1816, King of both Sicilies 1816–1825)
- Parma and Piacenza
  - Duke : Ferdinand (1765–1802)
- Piombino
  - Prince : Antonio Boncompagni Ludovisi (1777–1801)
- San Marino
  - Capitani Reggenti : Camillo Bonelli and Livio Casali (1799–1800)
  - Capitani Reggenti: Francesco Faetani and Matteo Martelli (1800)
  - Capitani Reggenti: Giuseppe Mercuri and Pier Vincenzo Giannini (1800–1801)
- Sardinia (personal union with Savoy)
  - King : Karl Emanuel IV. (1796–1802) (1796–1819 Duke of Savoy)
    - Viceroy : Filippo Vivalda di Castillino (1794–1799)
    - Viceroy: Karl Felix of Savoy (1799–1821) (1821–1831 King of Sardinia, 1824–1831 Duke of Savoy)
- Savoy (personal union with Sardinia)
  - Duke : Charles Emanuel IV. (1796–1819) (1796–1802 King of Sardinia)
- Sicily (1735–1806 in personal union with Naples)
  - King : Ferdinand III. (1759–1816) (1759–1799, 1799–1806, 1815–1816 King of Naples, 1816–1825 King of the Two Sicilies)
    - Viceroy : Tommaso Firrao (1798–1802)
- Tuscany
  - Grand Duke : Ferdinand III. (1790–1801, 1814–1824 ) (1803–1805 Elector of Salzburg, 1805–1806 Elector of Würzburg, 1806–1814 Grand Duke of Würzburg)

Moldova (under Ottoman rule)
- Prince : Constantin Ipsilanti (1799–1801) (1802–1806 Prince of Wallachia)

Monaco
- occupied by France (1793-1814)

Montenegro (under Ottoman suzerainty)
- Prince-Bishop (Vladika) : Petar I. Petrović-Njegoš (1782–1830)

Ottoman Empire
- Sultan : Selim III. (1789–1803)

Portugal
- Queen : Maria I (1777–1816) (incapacitated in 1792) (1815–1816 Queen of Brazil)
- Regent: Johann Duke of Braganza (1792–1816) (1816–1826 King of Portugal, 1815–1816 Regent of Brazil, 1816–1822 King of Brazil)

Prussia
- King : Friedrich Wilhelm III. (1797–1840) (1797–1806 Elector of Brandenburg)

Russia
- Emperor : Paul I (1796–1801) (1762–1773 Duke of Holstein-Gottorf)

Sweden
- King : Gustav IV Adolf (1792–1809)

Spain
- King : Charles IV (1788–1808)

Hungary
- King : Franz I (1792–1835) (1792–1806 Emperor, 1792–1835 King of Bohemia, 1815–1835 King of Lombardy-Veneto, 1792–1797 1799–1800 Duke of Milan, 1792–1804 Archduke of Austria, 1804 –1835 Emperor of Austria)

Wallachia (under Ottoman rule)
- Prince : Alexandru Moruzi ( 1793–1796 , 1799–1801) (1792, 1802–1806, 1806–1807 Prince of Moldova)

Oceania and Pacific

Hawaii
- King: Kamehameha I (1795–1819)