José Joaquín Antonio Trejos Fernández (18 April 1916 – 10 February 2010) was 35th President of Costa Rica from 1966 to 1970.

As a student he obtained degrees in mathematics and economics from the University of Costa Rica.

During Mario Echandi's administration he was part of Costa Rica's delegation in the United Nations.

[4] Without any political experience he won the presidential election of 1966 as candidate of a "Unificación Nacional" coalition.

[5] During the Trejos presidency, the aggregated tax (IV) was introduced and the government debts were virtually erased.