Papa Leo XI (2 Juni 1535 – 27 Aprili 1605) alikuwa Papa kuanzia tarehe 1/10 Aprili 1605 hadi kifo chake. Alitokea Firenze, Italia. Jina lake la kuzaliwa lilikuwa Alessandro de' Medici. Alimfuata Papa Klementi VIII akafuatwa na Papa Paulo V. 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 Leo XI katika Kamusi Elezo ya Kikatoliki