North America
- Barbados
- Monarch - Elizabeth II, Queen of Barbados (1966–present)
- Governor-General - Sir Arleigh Winston Scott, Governor-General of Barbados (1967–1976)
- Prime Minister - Errol Barrow, Prime Minister of Barbados (1961–1976)
- Canada
- Monarch - Elizabeth II, Queen of Canada (1952–present)
- Governor General - Roland Michener, Governor General of Canada (1967–1974)
- Prime Minister -
- Lester B. Pearson, Prime Minister of Canada (1963–1968)
- Pierre Trudeau, Prime Minister of Canada (1968–1979)
- Costa Rica
- President - José Joaquín Trejos Fernández, President of Costa Rica (1966–1970)
- Cuba
- Communist Party Leader - Fidel Castro, First secretary of the Communist Party of Cuba (1965–2011)
- President - Osvaldo Dorticós Torrado, President of Cuba (1959–1976)
- Prime Minister - Fidel Castro, Prime Minister of Cuba (1959–2008)
- Dominican Republic
- President - Joaquín Balaguer, President of the Dominican Republic (1966–1978)
- El Salvador
- President - Fidel Sánchez Hernández, President of El Salvador (1967–1972)
- Guatemala
- President - Julio César Méndez Montenegro, President of Guatemala (1966–1970)
- Haiti
- President - François Duvalier, President for Life of Haiti (1957–1971)
- Honduras
- President - Oswaldo López Arellano, President of Honduras (1963–1971)
- Jamaica
- Monarch - Elizabeth II, Queen of Jamaica (1962–present)
- Governor-General - Sir Clifford Campbell, Governor-General of Jamaica (1962–1973)
- Prime Minister - Hugh Shearer, Prime Minister of Jamaica (1967–1972)
- Mexico
- President - Gustavo Díaz Ordaz, President of Mexico (1964–1970)
- Nicaragua
- President - Anastasio Somoza Debayle, President of Nicaragua (1967–1972)
- Panama
- De facto leader - Boris Martínez, Commandant of the National Guard of Panama (1968–1969)
- President -
- Marco Aurelio Robles, President of Panama (1964–1968)
- Arnulfo Arias, President of Panama (1968)
- José María Pinilla Fábrega, Chairman of the Provisional Junta of Panama (1968–1969)
- Trinidad and Tobago
- Monarch - Elizabeth II, Queen of Trinidad and Tobago (1962–1976)
- Governor-General - Sir Solomon Hochoy, Governor-General of Trinidad and Tobago (1960–1972)
- Prime Minister - Eric Williams, Prime Minister of Trinidad and Tobago (1956–1981)
- United States of America
- President - Lyndon B. Johnson, President of the United States (1963–1969)
Read more about this topic: List Of State Leaders In 1968
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“The North American system only wants to consider the positive aspects of reality. Men and women are subjected from childhood to an inexorable process of adaptation; certain principles, contained in brief formulas are endlessly repeated by the press, the radio, the churches, and the schools, and by those kindly, sinister beings, the North American mothers and wives. A person imprisoned by these schemes is like a plant in a flowerpot too small for it: he cannot grow or mature.”
—Octavio Paz (b. 1914)