List of heads of state 1855

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Africa

Egypt
- Khedive (viceroy): Muhammad Said (1854–1863)

Ethiopia
- Kaiser : Sahle Dengel (1851–1855)
- Emperor: Theodor II (1855–1868)

Buganda
- King : Suna II (1836-1856)

Bunyoro
- King : Kyebambe IV (1852-1869)

Burundi
- King : Mwezi IV. Gisabo (1852–1908)

Dahomey
- King : Gézo (1818-1856)

Liberia
- President : Joseph Jenkins Roberts (1847–1856)

Morocco
- Sultan : Mulai Abd ar-Rahman (1822-1859)

Rwanda
- King : Kigeri IV. (1853–1895)

Sokoto Caliphate
- Caliph : Aliyu Babba (1842-1859)

Zulu
- King : Mpande ka Senzangakhona (1840–1872)

America

North America

Mexico
- Head of State and Government:
  1. (officiating) Antonio López de Santa Anna (1853–15 August 1855)
  2. (temporarily) Martín Carrera (August 15 - September 12, 1855)
  3. (temporarily) Rómulo Díaz de la Vega (September 12th - October 3rd, 1855)
  4. (temporarily) Juan Álvarez Benítez (October 3, 1855–1856)

United States of America
- Head of State or Government: President Franklin Pierce (1853-1857)

Central America

Costa Rica
- Head of State and Government: President Juan Rafael Mora Porras (1849-1859)

Dominican Republic
- Head of State and Government: President Pedro Santana ( 1844–1848 , 1853–1856, 1859–1861 )

El Salvador
- Head of State and Government: President José María San Martín (1854-1856)

Guatemala
- Head of State and Government: President Rafael Carrera y Turcios ( 1844–1848 , 1851–1865)

Haiti
- Ruler: Emperor Faustin I (1847-1859)

Honduras
- Head of State and Government:
  1. President José de la Trinidad Francisco Cabañas Fiallos (1852– October 18, 1855)
  2. President José Santiago Bueso Soto (October 18 – November 8, 1855)
  3. President Francisco de Aguilar (November 8, 1855–1856)

Nicaragua
- Head of State and Government:
  1. President Fruto Chamorro Pérez (1853– March 12, 1855)
  2. President José María Estrada (March 12-October 22, 1855)
  3. (provisional) Patricio Rivas (October 30, 1855–1857)

South America

Argentina
- Head of State and Government: President Justo José de Urquiza (1854–1860)

Bolivia
- Head of State and Government:
  1. President Manuel Isidoro Belzu (1848– August 15, 1855)
  2. President Jorge Córdoba (August 15, 1855–1857)

Brazil
- Ruler: Emperor Peter II (1831–1889)

Chile
- Head of State and Government: President Manuel Montt (1851–1861)

Ecuador
- Head of State and Government: President José María Urbina (1852-1856)

New Granada (now Colombia )
- Head of State and Government:
  1. (incumbent) Vice-President José de Obaldía (1854–1 April 1855)
  2. President Manuel María Mallarino (April 1, 1855–1857)

Paraguay
- Head of State and Government: President Carlos Antonio López ( 1841–1844 , 1844–1862)

Peru (controversial)
- Head of State and Government:
  1. President José Rufino Echenique (1851– January 5, 1855)
  2. President Ramón Castilla (January 5, 1855–1862)

Uruguay
- Head of State and Government:
  1. (provisional) Venancio Flores (1854–10 September 1855)
  2. (provisional) Manuel Basilio Bustamante (September 10, 1855–1856)

Venezuela
- Head of State and Government:
  1. President José Gregorio Monagas (1851– January 20, 1855)
  2. President José Tadeo Monagas (January 20, 1855–1858)

Asia

Abu Dhabi
- Emir: Sa'id (1845–1855)
- Emir: Zayed I (1855-1909)

Ajman
- Sheikh: Humaid I. (1848–1872)

Afghanistan
- Emir: Dost Mohammed Khan (1842–1863)

Bahrain
- Emir: Muhammad ibn Khalifah Al Khalifah (1842–1868)

China ( Qing Dynasty )
- Emperor: Xianfeng (1850–1861)

British India
- Governor General : James Andrew Broun-Ramsay (1848-1856)

Japan
- Emperor : Kōmei (1846–1867)
- Shogun : ( Tokugawa ): Tokugawa Iesada (1853-1858)

Korea
- King: Cheoljong (1849–1864)

Kuwait
- Emir: Djabir I (1814-1859)

Oman
- Sultan: Said ibn Sultan (1804-1856)

Persia ( Qajar dynasty)
- Shah : Naser od-Din Shah (1848–1896)

Thailand
- King: Mongkut , King of Thailand (1851–1868)

Australia and Oceania

Hawaii
- King : Kamehameha IV (1855–1863)

Europe

Abkhazia
- Prince: Mikheil Sharvashidze (1822–1864)

Andorra
- Co-princes :
  - Emperor of France : Napoleon III. (1848-1870)
  - Bishop of Urgell : Josep Caixal i Estradé (1851–1879)

Belgium
- Head of State: King Leopold I (1831–1865)
- Head of Government:
  - Prime Minister Henri de Brouckère (1852–30 March 1855)
  - Prime Minister Pieter de Decker (March 30, 1855–1857)

Denmark
- Head of State: King : Christian VIII. Friedrich VII. (1848–1863)
- Head of Government: Prime Minister Peter Georg Bang (1854-1856)

German Confederation
- Austria
  - Emperor : Franz Joseph I (1848–1916)
    - Prime Minister: Karl Ferdinand Graf von Buol-Schauenstein (1852-1859)
- Prussia
  - King : Friedrich Wilhelm IV. (1840–1861)
    - Prime Minister : Otto Theodor Freiherr von Manteuffel (1850–1858)
- Principality of Anhalt-Bernburg
  - Duke : Alexander Karl (1834–1863)
- Principality of Anhalt-Dessau
  - Duke : Leopold IV (1817–1871)
- to bathe
  - Grand Duke : Ludwig II (1852-1856) unable to rule
  - Regent: Friedrich I. (1852-1856)
- Bavaria
  - King : Maximilian II (1848–1864)
- Braunschweig
  - Duke : Wilhelm (1831-1884)
- Bremen
  - Mayor : Johann Smidt (1821–1857)
- Frankfurt
  - Senior mayor : Eduard Ludwig von Harnier (1855) (1857) (1859)
- Hamburg
  - Mayor : Johann Ludewig Dammert (1843–1855)
  - Mayor: Heinrich Kellinghusen (1843–1844) (1845–1846) (1847–1848) (1851–1852) (1853–1854) (1855–1856) (1857–1858) (1859–1860)
  - Mayor: Nicolaus Binder (1855) (1857) (1859) (1861)
- Hanover
  - King : George V (1851–1866)
- Hessen-Darmstadt
  - Grand Duke : Ludwig III. (1848–1877)
- Hessen-Homburg
  - Landgrave : Ferdinand (1848–1866)
- Hessen-Kassel
  - Elector: Friedrich Wilhelm (1847–1866)
- Holstein and Lauenburg (personal union with Denmark 1815–1864)
  - Duke: Friedrich II. (1848–1863)
- Liechtenstein
  - Prince : Alois II. (1836-1858)
- lip
  - Prince : Leopold III. (1851–1873)
- Lübeck
  - Mayor : Karl Ludwig Roeck (1855–1856) (1859–1860) (1863–1864) (1867–1868)
- Luxembourg and Limburg (personal union with the Netherlands 1815–1890)
  - Grand Duke : Wilhelm III. (1849-1890)
- Mecklenburg-Schwerin
  - Grand Duke : Friedrich Franz II. (1842–1883)
- Mecklenburg-Strelitz
  - Grand Duke : Georg (1816–1860)
- Nassau
  - Duke : Adolf I (1839–1866)
- Oldenburg
  - Grand Duke : Nikolaus Friedrich Peter (1853–1900)
- Reuss older line
  - Prince : Heinrich XX. (1836-1859)
- Reuss younger line
  - Prince : Heinrich LXVII. (1854-1867)
- Saxony
  - King : Johann (1854–1873)
- Saxony-Altenburg
  - Duke : Ernst I (1853–1908)
- Saxe-Coburg and Gotha
  - Duke : Ernst II (1844-1893)
- Saxony-Meiningen
  - Duke : Bernhard II. (1803–1866)
- Saxe-Weimar-Eisenach
  - Grand Duke : Carl Alexander (1853–1901)
- Schaumburg-Lippe
  - Prince : Georg Wilhelm (1787–1860) until 1807 Count
- Schwarzburg-Rudolstadt
  - Prince : Friedrich Günther (1807–1867)
- Schwarzburg-Sondershausen
  - Prince : Günther Friedrich Karl II. (1835–1880)
- Waldeck-Pyrmont
  - Prince : Georg Viktor (1845-1893)
- Württemberg
  - King : Wilhelm I (1816–1864)

France :
- Emperor : Napoleon III. (1851-1870)

Greece
- King : Otto I (1832–1862)

Italian states
- Papal States
  - Pope : Pius IX (1846–1870) (1870 dissolution of the Papal States - pontificate ends in 1878)
- Lombardy-Veneto (personal union with Austria 1815–1859 / 66)
  - King : Franz Joseph (1848–1859 / 66)
- Modena and Reggio
  - Duke : Franz V (1846-1859)
- Parma and Piacenza
  - Duke : Robert I (1854–1860) underage
  - Regent: Louise Marie Thérèse de Bourbon-Artois (1854–1860)
- San Marino
  - Capitani Reggenti : Francesco Guidi Giangi , Pietro Barbieri (October 1, 1854– April 1, 1855)
  - Capitani Reggenti: Gaetano Belluzzi (represented most of the time by Filippo Belluzzi ), Francesco Rossini (April 1, 1855– October 1, 1855)
  - Capitani Reggenti: Giovanni Benedetto Belluzzi , Marino Masi (October 1, 1855– April 1, 1856)
- Sardinia
  - King : Victor Emanuel II (1849–1861)
- Kingdom of the Two Sicilies
  - King : Ferdinand II (1830-1859)
- Tuscany
  - Grand Duke Leopold II (1824-1859)

Monaco
- Prince Florestan (1841-1856)

Montenegro (until 1878 under Ottoman suzerainty)
- Prince : Danilo II. Petrović-Njegoš (1851–1860) (until 1852 Prince-Bishop )

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: Wilhelm III. (1849-1890)

Norway
- King: Oskar I (1844-1859) (identical to Oskar I of Sweden; Norwegian-Swedish personal union)

Ottoman Empire
- Sultan: Abdülmecid I (1839–1861)

Portugal (common rule 1837-1853)
- King : Peter V (1853–1861)
- Regent: Ferdinand II (1853–1855) (1837–1853 king)

Russia
- Emperor : Nicholas I (1825–1855)
- Emperor: Alexander II (1855-1881)

Sweden
- King : Oskar I (1844-1859) (1844-1859 King of Norway)

Serbia (until 1878 under Ottoman suzerainty)
- Prince : Aleksandar Karađorđević (1842–1858)

Spain
- Queen : Isabella II (1833–1868)

Hungary
- King : Franz Joseph I (1848–1916) (1848–1916 King of Bohemia, 1848–1916 Emperor of Austria)

United Kingdom
- Head of State: Queen Victoria (1837–1901) (1877–1901 Empress of India)
- Head of Government:
  - Prime Minister George Hamilton-Gordon, 4th Earl of Aberdeen (1852–6 February 1855)
- Prime Minister Henry Temple, 3rd Viscount Palmerston (February 6, 1855–1858, 1859–1865 )

Wallachia (under Ottoman rule)
- Prince : Barbu Dimitrie Știrbei ( 1849–1853 , 1854–1856)