The Diocese of Gougark (Armenian: Գուգարաց թեմ Gougarats t'em), is a diocese of the Armenian Apostolic Church encompassing the northern Lori Province of Armenia. It is named after the historic province of Gugark; the 13th province of the Kingdom of Armenia. The modern-day province of Lori was one of the cantons of historic Gugark. The diocesan headquarters are located in the city of Vanadzor. The seat of the bishop is the Saint Gregory of Narek Cathedral. Until December 2010, the churches of Tavush Province were under the jurisdiction of the Diocese of Gougark, when the new Diocese of Tavush was founded by Catholicos Karekin II.