Mariano Villaronga Toro (9 November 1906 - 7 March 1987) was a Puerto Rican educator and Commissioner of Public Instruction in Puerto Rico from 1946 to 1957. Under his leadership as Commissioner of Public Instruction, three major institutions that still stand today were put in place: the Department of Education Printing Press, the public radio and television educational service, and the Free School of Music system. Most importantly, during his tenure Spanish was adopted as the official language of instruction in all levels of the Puerto Rico public education system, displacing instruction in English which had been pushed by the previous governments of Puerto Rico under US-appointed colonial governors.