Papa Marcello II (6 Mei 1501 – 1 Mei 1555) alikuwa Papa kuanzia tarehe 9/10 Aprili 1555 hadi kifo chake. Alitokea Montefano, Italia. Jina lake la kuzaliwa lilikuwa Marcello Cervini. Alimfuata Papa Julius III akafuatwa na Papa Paulo IV. Orodha ya Mapapa https://www.vatican.va/content/vatican/en/holy-father.index.html#holy-father https://www.vatican.va/content/vatican/en/holy-father.index.html#holy-father Papa Marcello II katika Kamusi Elezo ya Kikatoliki