Carolina Monroy del Mazo (born 21 August 1962) is a Mexican politician and member of the Institutional Revolutionary Party (PRI).

Monroy obtained her law degree in 1983 from the Universidad del Valle de Toluca and briefly taught there between 1984 and 1985.

In 2009, she was named to the state cabinet as the Secretary of Economic Development, a post she held until 2011.

She left the post in 2015 in order to run for the Chamber of Deputies from the 27th district, centered on the city.

[1] In 2015, she was elected as the PRI's general secretary and was to serve until 2018; after the resignation of Manlio Fabio Beltrones in June 2016, Monroy was tapped to be the party's interim president,[2] a capacity in which she served until Enrique Ochoa Reza became the party's president.