Soledad Estorach Esterri (6 February 1915, in Albatàrrec, Segrià, Spain – 14 March 1993, in Paris, France) was a Catalan anarcha-feminist. She created the Institut Mujeres Libres and Casal de la Dona Treballadora. She contributed to the papers Tierra y Libertad and Mujeres Libres as well as a book which was collectively written, Mujeres Libres.

Soledad Estorach Esterri was born in Albatàrrec, in the province of Lleida,^[1] on 6 February 1915.^[2] She was raised in a highly religious landowning family.^[3] She was taught to read and write by her father, who was a teacher in adult education. When her father died, she was forced to begin working at the age of 11. When she was 15, she convinced her mother to allow her to move to Barcelona, where she could earn more money and continue her education. Upon arriving in the Catalan capital, she initially worked in her uncle's workshop, but it experienced economic difficulties and was closed due to the Great Depression. She then briefly worked as a maid, but the long hours and low pay quickly convinced her to seek work elsewhere.^[1]

During the 1930s, Estorach spent her days working in a factory and received an education in night school, through which she became involved in the trade union activities of the Confederación Nacional del Trabajo (CNT). After the proclamation of the Second Spanish Republic in 1931, Estorach became involved in a youth activist group. In 1934, Estorach and other women of the CNT formed a mutual aid network, which they called the Women's Cultural Group.^[1] In 1936, the women's group held a rally at the Teatre Circ Olympia [ca], which formed the basis for a regional women's organisation. They made contact with the Mujeres Libres organisation, and subsequently became the organisation's Catalan regional branch.^[3] That year, she also joined the Libertarian Youth (FIJL) and participated in the revolutionary committee in the El Clot neighbourhood, where she helped lead the resistance to the July 1936 military uprising in Barcelona.^[2]

During the first days of the Spanish Revolution of 1936, Estorach and her comrades occupied the Casa Cambó [ca] and made it into the headquarters of the CNT.^[1] During the Spanish Civil War, Estorach organised soup kitchens and other mutual aid initiatives, and travelled around the Levante as a representative of the FIJL.^[3] She also established the House of the Woman Worker (Catalan: Casal de la Dona Treballadora) and collaborated to the Tierra y Libertad magazine. After the defeat of the Republicans, Estorach and her partner Andrés G. De la Riva fled to France.^[1] On the other side of the border, she learnt that Pepita Carpeña was still in Barcelona, so she returned in a car to rescue her.^[2]

Estorach and De la Riva settled in Bordeaux in 1940. Estorach attempted to return to Spain in 1945, but was again forced to flee due to political repression.^[1] During the 1960s and 1970s, she contributed to a second edition of the Mujeres Libres magazine;^[2] she later contributed to the publication of a book about the organisation.^[1] Estorach died in Paris,^[1] on 14 March 1993.^[2]

• Anarchism in Spain
• Mujeres Libres

• Abejon Olivera, Maria Soledad (12 October 2010). "Soledad Estorach Esterri". Diccionari Biogràfic de Dones [ca] (in Catalan). Archived from the original on 26 January 2020. Retrieved 23 January 2025.
• Heath, Nick (2 January 2008). "Estorach, Soledad, 1915-1993". Libcom.org. Retrieved 23 January 2025.

• Ackelsberg, Martha (2005) [1991]. Free Women of Spain (2nd ed.). Oakland: AK Press. ISBN 1-902593-96-0. LCCN 2003113040. OCLC 63382446.