Papa Viktor III, O.S.B. (takriban 1026 – 16 Septemba 1087) alikuwa Papa kuanzia tarehe 24 Mei 1086 au 9 Mei 1087 hadi kifo chake. Alitokea Benevento, Italia. Jina lake la kuzaliwa lilikuwa Dauferius (Desiderius). Alimfuata Papa Gregori VII akafuatwa na Papa Urbano II. Papa Leo XIII alimtangaza mwenye heri. Sikukuu yake huadhimishwa tarehe ya kifo chake. 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 Martyrologium Romanum Papa Viktor III katika Kamusi Elezo ya Kikatoliki