María Arrillaga is a Puerto Rican poet who has been a professor at the University of Puerto Rico. She taught in the Spanish Department on the Rio Piedras campus. She is a member of PEN American Center as well as PEN Club de Puerto Rico. She was a member of the Women's Writing Committee of PEN International, served as its secretary and organizer for Latin America. Arrillaga was president of PEN Club de Puerto Rico during 1989–1991. She has contributed to the following journals: Confrontation, Cupey, Festa Da Palabra, PEN International, and Tercer Milenio.