Rina María Contreras López (born 10 February 1950) is a Costa Rican politician who was the President of the Legislative Assembly of Costa Rica from 2000 to 2001, and as the minister of the Presidency from 2002 to 2003, during the administration of Abel Pacheco.

She attended the Escuela Sagrado Corazón de Jesús, in that country, and later Colegio Monterrey, located in the city of San Pedro.

Her mother would marry a new person for the third time, this time to Francisco Calderón Guardia, a Costa Rican politician and brother of then-Republican President Rafael Ángel Calderón Guardia.

[3] Contreras enrolled at Lincoln College and the Instituto Parauniversitario American Business Academy, where she would obtain the title of technician in bilingual secretariat.

[2] At the age of 16, she began a courtship with Guillermo Madriz de Mezerville, who would later enter a political career and with whom she married in 1968.