Gladys del Carmen Marín Millie (Spanish pronunciation: ['glaðis ma'?in]; July 16, 1938 – March 6, 2005) was a Chilean activist and political figure.
She was Secretary-General of the Communist Party of Chile (PCCh) (1994–2002) and then president of the PCCh until her death.
She was a staunch opponent of General Augusto Pinochet and filed the first lawsuit against him, in which she accused him of committing human rights violations during his seventeen-year dictatorship.