Sofía Castro Ríos (born 18 September 1970) is a Mexican lawyer and politician affiliated with the Institutional Revolutionary Party (PRI).

She has been elected to the Chamber of Deputies for the fifth district of Oaxaca on two occasions: in the 2003 mid-terms[1] and in the 2009 mid-terms.

[2] Castro Ríos was the joint candidate of the PRI, the National Action Party (PAN) and the Party of the Democratic Revolution (PRD) for Oaxaca's fifth in the 2021 mid-terms[3] but lost to Carol Antonio Altamirano of the National Regeneration Movement (Morena).

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