Current Leader of the World (24.02.2008)
The List is far from complete and will be extended from time to time. For each country I know, I underlined the person, who has the most powerful office - head of state or chief of government.
| Country | Head of State | Title | Chief of Gouvernment |
| Afghanistan | Hamid Karsai (1957), since 2001 | President | - |
| Antigua and Barbuda | Elizabeth II (1926), since 1952 | Queen | Baldwin Spencer (1948), since 2004 |
| Armenia | Serzh Sarkisyan (1954) | President | Tigran Sarkisyan (1960) |
| Austria | Heinz Fischer (1938), since 2004 | Federal President | Alfred Gusenbauer (1960), since 2007 |
| Belgium | Albert II (1934), since 1993 | King | Yves Leterme (1960) since 2008 |
| Belize | Elizabeth II (1926), since 1952 | Queen | Dean Barrow (1951), since 2008 |
| Bosnia and Herzegovina | Haris Silajdzic (1945) since 2008 | President | Nikola Spiric (1956) since 2007 |
| Botswana | Ian Khama (1953) | President | - |
| China, Republic of | Ma Ying-jeou (1950), since 2008 | President | Liu Chao-shiuan (1943) , since 2008 |
| Costa Rica | Oscar Arias Sánchez (1941), since 2006 | President | - |
| Cuba | Rául Castro (1931), since 2008 | President | Rául Castro (1931), since 2008 |
| Denmark | Margarete II (1940), since 1972 | Queen | Anders Fogh Rasmussen (1953), since 2001 |
| Egypt | Hosni Mubarak (1928), since 1981 | President | Ahmed Nazif (1952), since 2004 |
| France | Nicolas Sarkozy (1955), since 2007 | President | François Fillon (1954), since 2007 |
| Germany | Horst Köhler (1943), since 2004 | Federal President | Angela Merkel (1954), since 2005 |
| Guinea | Lansana Conté (1934), since 1984 | President | Ahmed Tidiane Souaré (1951) , since 2008 |
| Hungary | László Sólyom (1942), since 2005 | President | Ferenc Gyurcsány (1961) since 2004 |
| Ireland | Mary McAleese (1951), since 1997 | President | Brian Cowen (1960), since 2008 |
| Italy | Giorgio Napolitano (1925), since 2006 | President | Silvio Berlusconi (1936), since 2008 |
| Japan | Akihito (Heisei) (1933), since 1989 | Emperor | Yasuo Fukuda (1936), since 2007 |
| Kosovo | Fadmir Sejdiu (1951), since 2006 | President | Hashim Thaçi (1969), since 2006 |
| Kuwait | Sabah Al Ahmad Al Jabir Al Sabah (1929), since 2006 | Emir | Nasser Muhammad Al Ahmad Al Sabah (1941), since 2006 |
| Libya | Muftah Muhammad Kaiba (since 2008) | Secretaries of the General People's Congress | Al-Baghdadi Ali al-Mahmudi(1945) since 2006 |
| Mauretania | Sidi Mohamed Ould Cheikh Abdallahi (1938), since 2008 | President | Yahya Ould Ahmed El Waghef (1960), since 2008 |
| Nepal | Girija Prasad Koirala (1925), Since 2008 | President | Girija Prasad Koirala (1925), since2006 |
| Pakistan | Pervez Musharraf (1943) since 2001 | President | Yousaf Raza Gilani (1952) since 2008 |
| Peru | Alan García Pérez (1949), since 2006 | President | Jorge del Castillo (1950), since 2006 |
| Russia | Dmitry Medvedev (1965), since 2008 | President | Vladimir Putin, since 2008 |
| Sáo Tomé and Principe | Fradique de Menezes (1942), since 2001 | President | Patrice Trovoada (1962), since 2008 |
| San Marino | Rosa Zafferani (1960) and Federico Pedini Amati (1976), since 2008 | Capitani Reggenti | - |
| Sao Tomé and Principe | Fradique de Menezes (1942), Since 2001 | President | Joaquim Rafael Branco (1953), since 2008 |
| Saxonia (Germany) | Stanislaw Tillich (1959), since 2008 | Ministerpresident | - |
| Slovakia | Ivan Gasparovic (1941), since 2004 | President | Robert Ficeo (1964), since 2006 |
| Slovenia | Danilo Türk (1952), since 2007 | President | Janez Jansa (1958), since 2004 |
| Spain | Juan Carlos I (1938), since 1975 | King | José Luis Rodríguez Zapatero (1960), since 2004 |
| Tansania | Jakaya Kikwete (1950), since 2005 | President | Mizengo Pinda (1948, since 2008 |
| Thailand | Bhumibol Adulyadej (Rama IX) (1927), since 1946 | King | Samak Sundaravej (1935), since 2008 |
| United Kingdom of Great Britain and Northern Ireland |
Elizabeth II (1926), since 1952 | Queen | Gordon Brown (1952), since 2007 |
| United States of America | George W. Bush (1946), since 2001 | President | - |
| Uruguay | Tabaré Vázquez (1940), since 2005 | President | - |
| Vietnam | Nguyen Minh Triet (1942), since 2006 | President | Nguyen Tan Dung (1949), since2006 |