List of state leaders in 1903
1902 state leaders - Events of 1903 - 1904 state leaders - State leaders by year
Africa
Asia
- Afghanistan - Habibullah Khan, Emir of Afghanistan (1901–1919)
- Brunei - Hashim Jalilul Alam Akamuddin, Sultan of Brunei (1885–1906)
- Cambodia -
- Monarch - Norodom, King of Cambodia (1860–1904)
- French Resident-Superior - Henri de Lamothe, Resident-Superior of Cambodia (1902–1904)
- China (Qing Dynasty)
- India
- Japan
- Korea (Korean Empire) - Gojong, Emperor of Korea (1864–1907, King before 1897)
- Oman - Faisal Bin Turki, Sultan of Oman (1888–1913)
- Persia - Mozzafar-al-Din Shah, Shah of Persia (1896–1907)
- Qu'aiti - Awadh I bin Omar Al Qu'aiti, Sultan (1902–1909)
- Siam - Chulalongkorn (Rama V), King of Siam (1868–1910)
Australia and Oceania
- Australia -
- New Zealand
- Tonga
Europe
- Andorra
- Co-Princes:
- First Syndic - Bonaventura Maestra, First Syndic of Andorra (1902–1905)
- Austria-Hungary
- Belgium
- Bulgaria
- Denmark
- Finland
- France -
- German Empire -
- Greece -
- Italy
- Luxembourg
- Netherlands
- Norway -
- Ottoman (Turkish) Empire
- Portugal -
- Russia - Nicholas II, Tsar of Russia (1894–1917)
- Serbia
- Spain -
- Sweden -
- United Kingdom -
North America
- Canada
- Costa Rica - Ascen Esquivel Irieha, President of Costa Rica (1902–1906)
- Cuba: Tomás Estrada Palma, President of Cuba (1902–1906)
- Dominican Republic
- El Salvador
- Tomás Regalado, President of El Salvador (1898–1903)
- Pedro José Escalón, President of El Salvador (1903–1907)
- Guatemala: Manuel Estrada Cabrera, President of Guatemala (1898–1920)
- Haiti: Pierre kerbi Alexis, President of Haiti (1902–1908)
- Honduras
- Terencio Sierra, President of Honduras (1899–1903)
- Juan Ángel Arias, President of Honduras (1903)
- Manuel Bonilla, President of Honduras (1903–1907)
- México: Porfirio Díaz, President of Mexico (1884–1911)
- Nicaragua: José Santos Zelaya, President of Nicaragua, (1893–1909)
- United States: Theodore Roosevelt, President of the United States (1901–1909)
South America
- Acre: José Plácido de Castro, President of Acre (1903)
- Argentina: Julio A. Roca, President of Argentina (1898–1904)
- Bolivia: Manuel Pando, President of Bolivia (1899–1904)
- Brazil: Francisco de Paula Rodrigues Alves, President of Brazil (1902–1906)
- Chile: Germán Riesco, President of Chile (1901–1906)
- Colombia: José Manuel Marroquín, President of Colombia (1900–1904)
- Ecuador: Leónidas Plaza Gutiérrez, President of Ecuador (1901–1905)
- Paraguay: Juan Antonio Escurra, President of Paraguay (1902–1904)
- Peru:
- Eduardo López de Romaña, President of Peru (1899–1903)
- Manuel Candamo, President of Peru (1903–1904)
- Uruguay -
- Juan Lindolfo Cuestas, President of Uruguay (1899–1903)
- José Batlle y Ordóñez, President of Uruguay (1903–1907)
- Venezuela: Cipriano Castro, President of Venezuela (1899–1908)