The daughter of Ernesto Boya and the politician Maria Pilar Busquets, she has a degree in Environmental Sciences from the Autonomous University of Barcelona (2002), a master's degree in Landscape Design (2004), and a PhD in Land Management and Planning (2009) from the Université de Montréal.

In the professional field, she is a consultant and adjunct lecturer[1] ("asociada") of the Humanities Department of Pompeu Fabra University.

[3] Her brother, Jusèp Boya Busquet [es], has been general director of Archives, Libraries, Museum, and Heritage of the Generalitat beginning in January 2016, an office that he was dismissed from after the 2017 suspension of Catalonian self-government.

Boya is a founder and former coordinator of the Assemblea Nacional Catalana in Val d'Aran and councilor in the city of Les for the Corròp party, framed in Occitan nationalism.

[9] On 22 December 2017, Judge Pablo Llarena of the Supreme Court of Spain agreed on the inquiry (previously charged) for rebellion against Mireia Boya (president of the CUP's parliamentary group), Artur Mas (president of the PDeCat), Marta Rovira (secretary general of the ERC), Anna Gabriel (spokesperson of the CUP), Marta Pascal (general coordinator of the CUP), and Neus Lloveras [es] (president of the AMI), all for belonging to the organizing team of the Catalan independence referendum held on 1 October 2017 and with a decisive role in the secessionist plan, whose roadmap was annulled by the Spanish Constitutional Court.