Maria Ofelia Erenia Nieto Iglesias (better known as Ofelia Nieto; Algete, March 18, 1898 - Madrid, 22 May 1931) was a Spanish opera and zarzuela singer.
She was the daughter of José Nieto Méndez, a notary of Burgos, and Erundina.
She was a sister of Ángeles Ottein and José Nieto, who were also opera and zarzuela singers.
Nieto was 14 when she debuted in Amadeu Vives i Roig's Maruxa in the title role.