Papa Yohane I alikuwa Papa kuanzia tarehe 13 Agosti 523 hadi kifo chake tarehe 18 Mei 526. Alitokea Toscana, Italia. Alimfuata Papa Hormisdas akafuatwa na Papa Felisi IV. Tangu kale anaheshimiwa kama mtakatifu. Sikukuu yake ni tarehe 18 Mei. Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko 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: ex Decreto Sacrosancti oecumenici Concilii Vaticani II instauratum auctoritate Ioannis Pauli P.P. II promulgatum, Romae 2001, ISBN 8820972107 Kuhusu Papa Yohane I katika Kamusi Elezo ya Kikatoliki Patron Saints Index: Archived 21 Mei 2009 at the Wayback Machine. Fontes Latinae de papis usque ad annum 530 (Papa Felix IV) Liber pontificalis