| Birth Date: | 28 November 1940 |
| Birth Place: | Santiago, Chile |
| Citizenship: | Spanish |
| Alma Mater: | University of Navarra |
| Notable Works: | Spanish; Castilian: Cómo pudo pasarnos esto. Crónica de una chica de los 60.|italics=yes |
| Relatives: | Bernardo Estornés Lasa & Ignacia Zubizarreta (parents) |
| Awards: |
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Idoia Estornés Zubizarreta (Santiago de Chile, 28 November 1940) is a Chilean-born Spanish historian and writer. She was honored with the "Premio Literario de Ensayo Euskadi" in 1988 and the in 2014.
Idoia Estornés Zubizarreta was born in Santiago de Chile in 1940, into a Basque nationalist family exiled due to the Civil War. Her parents are Bernardo Estornés Lasa and Ignacia Zubizarreta. In 1958, she settled in San Sebastián, where, in 1961, she began her degree in Philosophy and Letters. Between 1962 and 1966, she completed her studies at the University of Navarra, where she later obtained a doctorate in history in 1988.[1]
In 1976, she published her first work, Spanish; Castilian: Carlismo y abolición foral. 1876–1976|italics=yes (Carlism and the abolition of the charters. 1876–1976) (Auñamendi Encyclopedia, San Sebastián, 1976). Subsequently, she has been the editorial director of the Basque Encyclopaedic Dictionary by Auñamendi and a contributor to various Spanish and French press. Between 2000 and 2006, she also directed the update of the Illustrated General Encyclopaedia of the Basque Country, devoting herself exclusively to it.
In 2013, she published her work, Spanish; Castilian: Cómo pudo pasarnos esto. Crónica de una chica de los 60.|italics=yes (How could this have happened to us. Chronicle of a girl from the 60s.) (Erein, San Sebastián, 2013, pp. 572), which was a finalist for the 2014 National Essay Award and received the 2014 Euskadi Literature Award, in the category of literature in Spanish.[2]