Héctor Martínez Muñoz (December 14, 1924 – November 14, 1991) was the first member of the Supreme Court of Puerto Rico appointed by Governor Luis A. Ferré and confirmed by an opposition-controlled Senate of Puerto Rico presided by Rafael Hernández Colón.
During twenty years he practiced law in the private sector but served ad honorem on the State Board of Education, as a Bar examiner and on the Legislative Committee of the Puerto Rico Bar Association.
Ferré, after withdrawing two nominations that the opposition-led Senate was going to reject, appointed Martínez as Associate Justice.
After Luis Negrón Fernández resigned on September 15, 1972 after a second stint as Chief Justice, Ferré nominated Martínez for Chief Justice but the Popular Democratic Party of Puerto Rico majority in the Senate rejected his elevation to the court's top post.
In the late 1970s, Governor Carlos Romero Barceló appointed him to several ad honorem posts, including the Governor's Judicial Nominations Advisory Committee and the Puerto Rico Council on Higher Education.