Diocese of Shirak (Armenian: Շիրակի թեմ Shiraki t'em), is one of the dioceses of the Armenian Apostolic Church covering the northern, central and south-western parts of the Shirak Province of Armenia.

It almost covers 4/5th of the province, as the south-eastern town of Artik and its surrounding villages are excluded.

The prelacy building is located on Rizhkov and Varpetats streets near the cathedral, at the centre of Gyumri.

In the final days of the First Republic of Armenia, the diocese was established upon a kontakion issued by Catholicos George V on September 6, 1920[1] after being separated from the Araratian Pontifical Diocese.

[2] The prelacy building of the Diocese of Shirak is located on Rizhkov and Varpetats Streets of Gyumri, near the Vartanants Square.