Sara María Ivonne Haza del Castillo (25 December 1938 – 16 June 2022) was an operatic soprano from the Dominican Republic. In a career of more than 50 years, she appeared at the National Theatre, and also in the U.S., Puerto Rico, Mexico, and Cuba. She also worked as a voice teacher, director of the National Opera, and speech therapist. She received honours from her home country and Italy, and an honorary doctorate from the Universidad Autónoma de Santo Domingo