Papa Sergio II alikuwa Papa kuanzia tarehe 25 Januari 844 hadi kifo chake tarehe 27 Januari 847. Alitokea Roma, Lazio, Italia. Alimfuata Papa Gregori IV akafuatwa na Papa Leo 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 Sergio II katika Kamusi Elezo ya Kikatoliki