At the beginning of the 20th century, the Araratian Pontifical Diocese had 643 churches, 13 monastic complexes and more than 150 schools functioning under its jurisdiction.

After the Treaty of Moscow in 1921, the Araratian Diocese lost the territories of Kars and Nakhijevan.

[2] The diocesan headquarters are located in the capital Yerevan, next to the Saint Sarkis Cathedral.

As of June 2017, the diocese has the below listed churches and chapels functioning under its jurisdiction, operating throughout Yerevan and Ararat Province, with the exception of the 17th-century Khor Virap monastic complex in Ararat Province, the Cathedral of Saint Gregory in Yerevan opened in 2001, and the Surp Anna Church in Yerevan opened in 2015, which are directly regulated by the Mother See of Holy Etchmiadzin.

[3] Here is the list of churches, monasteries and chapels functioning under the jurisdiction of the Araratian Pontifical Diocese, along with their location and year of consecration: This is an incomplete list of inactive or ruined churches and monasteries in the territory regulated by the Araratian Pontifical Diocese: