Catholicos Dertad I was the 50th Catholicos-Patriarch of the Armenian Apostolic Church between 741 and 764.

According to the historian Kirakos Ganjaketsi, Dertad was from Otmus village and was a 'modest, blessed man, radiant in all virtue'. He reigned in a time of relative peace with a break in the Arab invasions.

Preceded byDavid I of Armenia Catholicos of the Holy See of St. Echmiadzin and All Armenians 741–764 Succeeded byDertad II
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