1889.11.10: Established as Diocese of Jamestown (English) / Iacobolitan(us) (Latin) (from Apostolic Vicariate of Dakota and became suffragan of Saint Paul)
1897.04.06: Suppressed (to establish Diocese of Fargo)
1995: Restored as Titular Episcopal See of Jamestown (English) / Iacobolitan(us) (Latin)