Margarita Prieto Yegros (18 October 1936 – 10 October 2017) was a Paraguayan writer, historian, and journalist. She received a doctorate in History at the University of Asunción and a master's degree in Political Science in 1993. She was a member of the Society of Paraguayan Writers and of the PEN Club of Paraguay. A regular contributor to , a women's magazine, she was a columnist in numerous newspapers in the capital and from 1986 she was part of a short story workshop which was directed by Professor Hugo Rodríguez-Alcalá.