Diego Fernández de Cevallos Ramos (Spanish pronunciation: [ˈdjeɣo feɾˈnandes ðe seˈβaʝos]; born 16 March 1941) is a Mexican lawyer and politician affiliated with the conservative National Action Party (PAN).

He joined the conservative National Action Party (PAN) in 1959 and led its parliamentary group in the Chamber of Deputies (during the 55th legislature) and in the Senate (2003–06).

In 1994 he ran for president representing his party and lost against the PRI candidate, Ernesto Zedillo Ponce de León.

At 80 years of age Fernández de Cevallos decided to join social media in order to persuade young people to adopt conservative values.

[1] President Andrés Manuel López Obrador (AMLO) responded to Fernández de Cevallos' criticisms of his government by showing a video of a debate they had in 2000.