José Joaquín Antonio Trejos Fernández (18 April 1916 10 February 2010) was President of Costa Rica from 1966 to 1970.
His parents were Juan Trejos Quirós and Emilia Fernández Aguilar. As a student he obtained degrees in mathematics and economics from the University of Costa Rica

University of Costa Rica

The University of Costa Rica is a public university in the Republic of Costa Rica, in Central America. Its main campus, Ciudad Universitaria Rodrigo Facio, is located in San Pedro, in the province of San José. It is the oldest, largest, and most prestigious institution of higher learning in...

. During Mario Echandi's

Mario Echandi Jiménez

Mario José Echandi Jiménez was President of Costa Rica from 1958 to 1962.- As diplomat :Mario Echandi was a career diplomat....

 administration he was part of Costa Rica's delegation in the United Nations

United Nations

The United Nations is an international organization whose stated aims are facilitating cooperation in international law, international security, economic development, social progress, human rights, and achievement of world peace...

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Trejos defeated Daniel Oduber

Daniel Oduber Quirós

Porfirio Ricardo José Luis Daniel Oduber Quirós served as President ofCosta Rica from 1974 to 1978. Early in his career he worked as a lawyer.In 1945 he went to Canada to study philosophy at McGill University, graduating with...

in the election that secured him the presidency.
Trejos died on 10 February 2010.

Elected as president

Without any political experience he won the presidential election of 1966 as candidate of a "Unificación Nacional" coalition. His victory was a close win over Daniel Oduber Quirós, with less than 4000 votes in his favor. Voters elected 26 congressmen from his party and the opposition won 29 seats.
During the Trejos presidency, the aggregated tax (IV) was introduced and the government debts were virtually erased.