Saint Husik I, often known as Husik (Armenian: Սբ. Հուսիկ Ա. Պարթև) was a Catholicos of Armenia's Holy Apostolic Church who lived in the fourth century. He was the fourth in line of then of the Parthian Catholicoi immediately after Gregory the Illuminator, St. Aristaces I and St. Vrtanes I. Husik was the son of Vrtanes I by an unnamed mother and had a brother called Grigoris who was martyred in Caucasian Albania (died c. 330–340). His paternal uncle was Aristaces I and paternal grandfather was the great Gregory the Illuminator.