1955 state leaders - Events of 1956 - 1957 state leaders - State leaders by year
Africa
Asia
Australia and Oceania
Europe
North America and the Caribbean
South America
- Argentina - Pedro Eugenio Aramburu, Provisional President of Argentina (1955-1958)
- Bolivia
- Víctor Paz Estenssoro, President of Bolivia (1952-1956)
- Hernán Siles Zuazo, President of Bolivia (1956-1960)
- Brazil -
- João Café Filho, President of Brazil (1954-1956)
- Juscelino Kubitschek de Oliveira, President of Brazil (1956-1961)
- Chile - Carlos Ibáñez del Campo, President of Chile (1952-1958)
- Colombia - Gustavo Rojas Pinilla, President of Colombia (1953 - 10 May 1957)
- Ecuador -
- Paraguay - Alfredo Stroessner, President of Paraguay (1954-1989)
- Peru -
- Manuel A. Odría, President of Peru (1948-1956)
- Manuel Prado Ugarteche, President of Peru (1956-1962)
- Uruguay -
- Luis Batlle Berres, President of Uruguay (1955-1956)
- Alberto Fermín Zubiría, President of Uruguay (1956-1957)
- Venezuela - Marcos Pérez Jiménez, President of Venezuela (1952-1958)
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