Afghanistan
|
Hamid Karzai is into his second term of office |
Albania
|
Mr Nishani is a former interior minister |
Algeria
|
President Bouteflika was elected to a third term of office in 2009 |
Angola
|
President Dos Santos is one of Africa's longest serving leaders |
Argentina
|
Cristina Fernandez |
Armenia
|
President Serge Sarkisian's 2008 win was followed by deadly clashes |
Austria
|
President Heinz Fischer is a former science minister |
Azerbaijan
|
Ilham Aliyev succeeded his father Heydar as president |
Bangladesh
|
Mr Hamid was Speaker of parliament before becoming president |
Belarus
|
Belarus President Alexander Lukashenko |
Benin
|
Mr Boni Yayi is in his second term as president |
Bolivia
|
The election of Mr Morales represented a major shift for Bolivia |
Botswana
|
Seretse Khama Ian Khama was a soldier before turning to politics |
Brazil
|
Ms Rousseff made a major leap to the top job when she became president in 2010 |
Bulgaria
|
President Plevneliev has overseen several changes of government |
Burkina Faso
|
President Compaore has been in power since 1987 |
Burma
|
Former general Thein Sein heads the first nominally civilian government since 1962 |
Burundi
|
Pierre Nkurunziza is one of Africa's youngest leaders |
Cameroon
|
Paul Biya has been leader for three decades |
Cape Verde
|
Jorge Carlos Fonseca won elections in 2011 |
Chad
|
President Deby faces an opposition revolt and allegations of corruption |
China
|
President Xi Jinping has a reputation for fighting corruption |
Colombia
|
Mr Santos maintains his predecessor's tough stance against Farc |
Comoros
|
Ikililou Dhoinine was vice-president before winning 2010's presidential election |
Cote d'Ivoire
|
President Ouattara was elected in November 2010 |
Croatia
|
Croatian President Ivo Josipovic |
Cuba
|
Raul Castro picked up the reins of power from his brother Fidel |
Cyprus
|
Nicos Anastasiades promised to secure a financial bailout for his country |
Czech Republic
|
President Zeman has been accused of attempting to undermine the Czech parliamentary system |
Democratic Republic of the Congo
|
Joseph Kabila is Africa's youngest head of state |
Djibouti
|
President Guelleh has ruled Djibouti since 1999 |
East Timor
|
Taur Matan Ruak headed the guerrilla force fighting for independence |
Ecuador
|
President Correa has mounted a nationalisation drive |
Equatorial Guinea
|
Mr Obiang has been in power for three decades |
Eritrea
|
Isaias Afewerki runs a one-party state accused of suppressing democracy |
Estonia
|
Social Democrat Hendrik Toomas Ilves has occupied the largely cermonial role of president since 2006 |
Federated States of Micronesia
|
President Emanuel "Manny" Mori |
Finland
|
President Sauli Niinisto is credited with leading the economy towards growth in the 1990s |
France
|
Mr Hollande's tax rises have met with fierce resistance |
French Polynesia
|
Gaston Flosse is a veteran of politics |
Gabon
|
Ali Ben Bongo's election was disputed by the opposition |
Gambia
|
Mr Jammeh has been accused of intolerance to criticism and dissent |
Georgia
|
Georgian Prime Minister Bidzina Ivanishvili (left) with President Giorgi Margvelashvili |
Germany
|
President Joachim Gauck |
Ghana
|
Mr Mahama became president when his predecessor died |
Greece
|
President Karolos Papoulias |
Guatemala
|
Guatemalan President Otto Perez Molina |
Guinea
|
Alpha Conde won the presidency in 2010 after a half-century in opposition |
Guyana
|
Mr Ramotar leads a minority government |
Haiti
|
Mr Martelly was known for his charismatic performances in his previous career as a singer |
Honduras
|
Mr Hernandez has promised to be tough on crime |
Hungary
|
President Janos Ader |
Iceland
|
President Grimsson often speaks out on controversial issues |
Indonesia
|
Mr Yudhoyono has made the fight against terrorism a key priority |
Iran
|
Hassan Rouhani is seen as a religious moderate |
Iraq
|
President Talabani is a veteran of Kurdish and Iraqi national politics |
Ireland
|
Michael D Higgins is a poet and politician |
Israel
|
Israel's elder statesman, Shimon Peres |
Italy
|
President Giorgio Napolitano has been a stabilising influence on Italian political life |
Kazakhstan
|
President Nazarbayev has been in power since the fall of the Soviet Union |
Kenya
|
Uhuru Kenyatta faces charges of crimes against humanity |
Kiribati
|
Anote Tong is into his third term |
Kyrgyzstan
|
Almazbek Atambayev urges unity among political forces |
Laos
|
Communist rule continues under Choummaly Sayasone |
Latvia
|
President Berzins is a wealthy businessman |
Lebanon
|
A Maronite Christian, Gen Michel Suleiman is widely regarded as a unifying figure |
Liberia
|
Liberian President Ellen Johnson Sirleaf |
Lithuania
|
Dalia Grybauskaite won the presidency in 2009 |
Madagascar
|
Mr Rajaonarimampianina is a former finance minister |
Malawi
|
Malawian President Joyce Banda |
Mali
|
Mr Keita |
Marshall Islands
|
Christopher Loeak is a veteran politician |
Mauritania
|
President Abdelaziz came to power in a coup, but now heads an elected government |
Mexico
|
Mr Pena Nieto will have to face the escalating violence of the drugs war |
Moldova
|
Nicolae Timofti served as a senior judge |
Mongolia
|
Mining and resources top Mr Elbegdorj's agenda |
Mozambique
|
Millionaire business Armando Guebuza came to power in 2005 |
Namibia
|
Mr Pohamba was a founding member of the rebel movement which fought for independence |
Nepal
|
Ram Baran Yadav, Nepal's first president |
Nicaragua
|
Daniel Ortega has replaced Marxist rhetoric with business-friendly policies |
Niger
|
Mr Issoufou's election marked a return to democracy after a year of military rule |
Nigeria
|
Most of President Jonathan's electoral support lies in the mainly Christian south |
Pakistan
|
Mamnoon Hussain is a textile businessman |
Palau
|
Mr Remengesau advocates action to combat global warming and protect Palau's environment |
Panama
|
President Martinelli was elected on a platform of encouraging economic growth |
Paraguay
|
Mr Cartes is one of Paraguay's wealthiest people |
Peru
|
Ollanta Humala comes from a family of prominent radicals |
Philippines
|
Until he ran for president, Noynoy Aquino was relatively unknown |
Poland
|
President Komorowski was active in the civil rights movement in the 1970s |
Portugal
|
President Anibal Cavaco Silva |
Republic of Macedonia
|
President Gjorge Ivanov has made it his mission to improve relations with neighbouring Greece |
Romania
|
President Basescu is a former sea captain |
Russia
|
Mr Putin has devoted a good deal of effort to burnishing his image as a strong leader |
Rwanda
|
Mr Kagame has been accused of being intolerant of opposition |
Sao Tome and Principe
|
Mr Pinto da Costa is serving his second, non-consecutive term in office |
Senegal
|
Mr Sall served as prime minister under his predecessor, Abdoulaye Wade |
Serbia
|
Mr Nikolic's Progressive Party has evolved from its nationalist roots to become more pro-EU |
Seychelles
|
James Michel served alongside long-time leader Albert Rene |
Sierra Leone
|
President Koromo came to power in elections |
Singapore
|
Tony Tan |
Slovakia
|
Ivan Gasparovic was first voted into office in 2004 |
Slovenia
|
Mr Pahor is seen as a more conciliatory figure than his predecessor |
Somalia
|
Hassan Sheikh Mohamud, elected president in Mogadishu |
South Africa
|
Jacob Zuma trod a rocky road to the presidency |
South Korea
|
Ms Park is the daughter of a former president |
South Sudan
|
Salva Kiir has led the SPLM since 2005 |
Sri Lanka
|
A giant cardboard cut-out of President Rajapaksa looks down on traffic |
Sudan
|
Omar Bashir came to power in a coup and faces war crimes charges |
Suriname
|
Desi Bouterse first led Suriname following a coup in 1980 |
Syria
|
Bashar al-Assad |
Taiwan
|
Taiwanese president Ma Ying-jeou |
Tajikistan
|
Emomali Rakhmon exerts tight control over the levers of power |
Tanzania
|
Jakaya Kikwete is into his second term |
Togo
|
President Faure Gnassingbe stepped into his father's shoes |
Tunisia
|
Moncef Marzouki opposed his predecessor and was forced into exile |
Turkey
|
Abdullah Gul is seen as a moderate figure |
Turkmenistan
|
President Berdymukhamedov is serving his second term |
Uganda
|
Yoweri Museveni is credited for saving Uganda from dictators, but has been criticized for hanging onto power |
Ukraine
|
President Yanukovych says he aims to balance Ukraine's ties between Russia and Europe |
United States
|
Barack Obama, the country's first black president |
Uzbekistan
|
President Karimov keeps a tight grip on the country |
Vanuatu
|
President Abil was elected in September 2009 |
Venezuela
|
Mr Maduro succeeded Hugo Chavez as president |
Vietnam
|
Truong Tan Sang was a senior figure in the Communist Party before becoming president |
Yemen
|
Abdrabbuh Mansour Hadi faces a monumental task in holding together Yemen's factions |
Zambia
|
Zambian President Michael Sata |
Zimbabwe
|
President Mugabe has ruled for more than three decades |