Maria Rosaria San Giorgio (born 16 July 1952) is an Italian magistrate, Judge of the Constitutional Court of Italy since 2020.

Graduated with a thesis in constitutional law in 1974, San Giorgio was councilor of the prefecture for five years, then moved on to the Government Commissariat for the region Emilia-Romagna.

Not long after, she was a study assistant at the Constitutional Court of Italy.

She was a member of the board of directors of the Supreme Court of Cassation from 2008 to 2012, of the Board of Arbitrators of the National Association of Magistrates, of the commission for the reform of the Code of Ethics of the Judiciary, as well as of the Board of Directors of the Specialization School for the legal professions at the LUMSA University.

[1] She taught civil law at the Graduate School of Legal Professions at La Sapienza University of Rome and collaborated with the chair of criminal procedure at the LUISS Guido Carli.