Karekin I Khachadourian of Constantinople

This article is about Karekin I Patriarch of Constantinople. For Karekin I Supreme Patriarch and Catholicos of All Armenians of Mother See of Holy Etchmiadzin (1995–1999) who previously served also as Karekin II, Catholicos of the Holy See of Cilicia (1983–1994), see Karekin I. For Karekin I Hovsepian Catholicos of the Holy See of Cilicia, see Karekin I (Cilicia).

Archbishop Karekin I Khachadourian (in Armenian Գարեգին Ա Խաչատուրյան) (6 November 1880, Trebizond – 22 July 1961, Istanbul) was the 81st Armenian Patriarch of Constantinople under the authority of the Catholicos of Armenia and of all Armenians.

He was born Khachik Khachadourian, taking the religious name Karekin when he became a priest. He was elected to the position in 1951 and served for 10 years as Patriarch of Constantinople until his death.