Papa Yohane IV alikuwa Papa kuanzia Agosti au tarehe 24 Desemba 640 hadi kifo chake tarehe 12 Oktoba 642. Alitokea Dalmatia. Jina la baba yake lilikuwa Venantius. Alimfuata Papa Severino akafuatwa na Papa Theodori I. 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 Sereno Detoni, Giovanni IV. Papa dalmata, Libreria Editrice Vaticana, 2006 ISBN 978-88-209-7889-1 Luciano Rota, I Papi Caio e Giovanni IV, in Istria e Dalmazia. Uomini e tempi, II, Dalmazia, Udine, Del Bianco 1992 Kuhusu Papa Yohane IV katika Kamusi Elezo ya Kikatoliki Makardinali wa Kanisa Katoliki