List of state leaders in 1842
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Africa
- Egypt Viceroy Muhammad Ali Pasha (1805-1848)
- Ethiopia Kaiser: Sahle Dengel (1841-1845)
- Buganda King: Suna II (1836-1856)
- Bunyoro King: Nyabongo II (1835-1848)
- Burundi King: Ntare Rugamba IV (1796-1852)
- Dahomey King: Gezo (1818-1856)
- Madagascar Queen: Ranavalona I (1782-1861)
- Prime Minister: Rainiharo († 1852)
- Morocco Sultan Moulay Abd al-Rahman (1822-1859)
- Rwanda King: Mutara II (1830-1853)
- Sokoto Caliphate Caliph Abu Bakr Atiku I. (1837-1842)
- Caliph Aliyu Babba (1842-1859)
- Vizier: Gidago dan Laima (1817-1842)
- Zulu King Mpande ka Senzangakhona (1840-1872)
America
North America
- Mexico Heads of State and Head of Government: President Nicolás Bravo (1841-1843)
- United States of America Heads of State and Head of Government: President John Tyler (1841-1845)
Central America
- Costa Rica Heads of State and Head of Government: Braulio Carrillo Colina (1841-1842)
- Francisco Morazán Quezada ( April-September 1842)
- Antonio Pinto Soares ( 11 September to 27 September 1842)
- José María Alfaro Zamora (1842-1844)
- El Salvador Heads of State and Head of Government: (provisional) Juan Lindo ( 1841-1 February. , 1842 )
- (acting) José Marín Escolastico ( 1 February to 12 April 1842)
- President Juan José Guzmán ( 12 April-30 June 1842)
- President Don Dionisio Villacorta ( 30 June-19 July 1842)
- President José Marín Escolastico ( 19 July to 26 December 1842)
- President Juan José Guzmán (26 December 1842-1844 )
- Guatemala Heads of State and Head of Government: President José Venancio López ( 1841-14. May 1842 )
- Minister Mariano Rivera Paz (May 14, 1842-1844 )
- Haiti Heads of State and Head of Government: President Jean -Pierre Boyer (1818-1843)
- Honduras Heads of state and head of government: President Francisco Ferrera (1841-1844)
- Nicaragua Heads of State and Head of Government: Supreme Director Pablo Buitrago (1841-1843)
South America
- Bolivia Heads of state and head of government: President Jose Ballivián (1841-1847)
- Brazil Ruler: Emperor Peter II (1831-1889)
- Chile Heads of State and Head of Government: President Manuel Bulnes Prieto (1841-1851)
- Ecuador Heads of state and head of government: President Juan José Flores (1830-1834, 1839-1843, 1843-1845)
- New Granada (now Colombia) Heads of State and Head of Government: President Pedro Alcántara Herrán (1841-1845)
- Paraguay Heads of State and Head of Government: Consul Mariano Roque Alonzo (1841-1844), Carlos Antonio López (1841-1844, 1844-1862)
- Peru (disputed ) Heads of State and Head of Government: President of the Governing Council Manuel Menéndez ( 1841-16. August 1842 )
- President Juan Crisóstomo Torrico ( 16 August-17 October 1842)
- President Juan Francisco de Vidal (October 17, 1842-1843 )
- Río de la Plata (now Argentina) Heads of State and Head of Government: ( vacant)
- Governor of the Province of Buenos Aires: General Juan Manuel de Rosas (1835-1852)
- Uruguay Heads of State and Head of Government: President Fructuoso Rivera (1838-1843)
- Venezuela ( disputed) Heads of State and Head of Government: President José Antonio Páez (1830-1835, 1839-1843)
Asia
- Abu Dhabi Caliph Caliph 'm Shakhbut (1833-1845)
- Sultan: Sultan bin Shakhbut (1833-1845)
- Ajman Sheikh Abdul Aziz I. (1841-1848)
- Afghanistan Emir: Shoja Shah Durrani (1839-1842)
- Emir: Dost Muhammad Khan (1842-1863)
- Bahrain Shaykh Muhammad ibn Khalifah Al Khalifah (1834-1842)
- Brunei Sultan Omar Ali Saifuddin II († 1852)
- China ( Qing Dynasty ) Kaiser: Daoguang (1821-1850)
- British India Governor General: George Eden (1836-1842)
- Edward Law (1842-1844)
- Japan Kaiser: Ninko (1817-1846)
- Shogun: ( Tokugawa ): Tokugawa Ieyoshi ( 1837-1853 )
- Korea King: Heonjong (1834-1849)
- Kuwait Emir: Djabir I. (1814-1859)
- Oman Sultan Sa'id ibn Sultan II (1804-1856)
- Ottoman Empire Sultan Abdülmecid I (1839-1861)
- Persia ( Qajar dynasty ) Shah Mohammed Shah (1834-1848)
- Thailand King Rama III, King of Thailand ( 1824-1851 ).
Australasia
- Hawaii King Kamehameha III. (1825-1854)
Europe
- Abkhazia Prince: Mikheil Sharvashidze (1822-1864)
- Andorra Co - Prince: King of the French Louis - Philippe I (1830-1848)
- Bishop of Urgell: Simó de Guardiola y Hortoneda (1828-1851)
- Belgium King Leopold I. (1831-1865) Prime Minister: Barthélémy de Theux de Meylandt (1834-1843) (1846-1847)
- Denmark King Christian VIII (1839-1848) Prime Minister: Otto Joachim (1824-1842)
- German Bund Austria Emperor Ferdinand I. (1835-1848) Klemens Wenzel Lothar State Chancellor Metternich (1821-1848)
- King Friedrich Wilhelm IV (1840-1861)
- Duke: Karl Alexander (1834-1863)
- Duke Leopold IV (1817-1871)
- Duke Heinrich (1830-1847)
- Grand Duke Leopold (1830-1852)
- King: Ludwig I (1825-1848) Minister of State: Friedrich August Freiherr von Gise (1832-1846)
- Duke Wilhelm (1831-1884)
- Mayor: Johann Smidt (1821-1857)
- Mayor: Simon Hermann nuns (1822-1847)
- Mayor: Johann Michael Duntze (1824-1845)
- Mayor: Johann Daniel Noltenius (1839-1852)
- Mature Mayor: Gottfried Scharff (1840 ) ( 1842) (1844 ) ( 1846)
- Mayor: Johann Heinrich Bartels (1820-1850)
- Mayor: Amandus Augustus Abendroth (1831-1842)
- Mayor: Christian Daniel Benecke (1835-1851)
- Mayor: David Schlüter (1835-1843)
- King: Ernst August (1837-1851)
- Grand Duke: Ludwig II (1830-1848)
- Landgrave Philipp (1839-1846)
- Elector William II (1821-1847)
- Prince Konstantin (1838-1849)
- Prince Karl (1831-1848)
- Duke: Christian I. (1839-1848)
- Prince Alois II (1836-1858)
- Prince Leopold II (1802-1851)
- Mayor: Christian Nicolaus of Evers ( 1836) (1838 ) ( 1840) (1842 ) ( 1844)
- Grand Duke William II (1840-1849)
- Grand Duke Paul Friedrich (1837-1842)
- Grand Duke Friedrich Franz II (1842-1883)
- Grand Duke: Georg (1816-1860)
- Duke: Adolf I (1839-1866)
- Grand Duke Paul Friedrich August (1829-1853)
- Prince Heinrich XX. (1836-1859)
- Prince Heinrich LXXII. (1822-1848)
- Prince Heinrich LXII. (1818-1848)
- King Friedrich August II (1836-1854)
- Duke: Joseph (1834-1848)
- Duke Ernst I. (1826-1844)
- Duke Bernhard II (1803-1866)
- Grand Duke Carl Friedrich (1828-1853)
- Prince Georg Wilhelm (1787-1860) to 1807 Count
- Prince Friedrich Günther (1807-1867)
- Prince Günther Friedrich Karl II (1835-1880)
- Prince: George II (1813-1845)
- King: William I (1816-1864)
- France King Louis - Philippe I (1830-1848) Prime Minister: Nicolas Jean -de- Dieu Soult (1840-1847)
- Greece King Otto I. (1832-1862)
- Italian States Church State Pope Gregory XVI. (1831-1846)
- King Ferdinand (1835-1848)
- Duke Karl Ludwig (1824-1847)
- Duke: Franz IV (1814-1846)
- Duchess Marie- Louise (1814-1847)
- Captains Regent: Girolamo Gozi, Francesco Guidi Giangi (1 October 1841-1 April 1842. )
- Captains Regent: Domenico Maria Belzoppi, Pier Matteo Berti (1 April 1842-1 October 1842. )
- Captains Regent: Giuseppe Gozi, Domenic 'Antonio Bartolotti (1 October 1842-1 April 1843. )
- King, Charles Albert (1831-1849)
- King Ferdinand II (1830-1859)
- Grand Duke Leopold II (1824-1859)
- Monaco Prince Florestan (1841-1856)
- Montenegro ( until 1878 under Ottoman suzerainty ) Prince-bishop ( Vladika ): Petar II Petrović - Njegoš ( 1830-1851 )
- Neutral Moresnet Ruler: Leopold I, King of Belgium (1831-1865)
- Ruler: Friedrich Wilhelm IV, King of Prussia (1840-1861)
- Mayor Arnold Timothée de Lasaulx (1817-1859)
- Netherlands King William II (1840-1849)
- Norway King Charles III. Johann (1818-1844) (same as Charles XIV John of Sweden, Swedish -Norwegian personal union )
- Ottoman Empire Sultan Abdülmecid I (1839-1861)
- Portugal Queen Maria II (1826-1828) (1834-1853)
- King Ferdinand II (1837-1853)
- Russia Tsar Nicholas I. (1825-1855)
- Sweden King Karl XIV Johan (1818-1844) (. Identical to Charles III John of Norway, Norwegian - Swedish personal union )
- Serbia ( until 1878 under Ottoman suzerainty ) Prince Mihailo Obrenović (1839-1842) (1860-1868)
- Prince Aleksandar Karadjordjević (1842-1858)
- Spain Queen Isabella II (1833-1868)
- Hungary King Ferdinand V (1835-1848)
- United Kingdom Queen Victoria (1837-1901)
- Prime Minister Robert Peel (1842-1846)