Julia Urquidi Illanes (30 May 1926 – 10 March 2010) was a Bolivian writer.
Urquidi was born in Cochabamba. She was famous as the first wife of Peruvian writer Mario Vargas Llosa (1955-1964) and also the namesake of one of his most famous novels, Aunt Julia and the Scriptwriter.
In 1983 she published her memories titled Lo que Varguitas no dijo (English: What Varguitas did not say).
She died in Santa Cruz de la Sierra, aged 83.