Diocese of Baku and Azerbaijan (Russian: Бакинская и Азербайджанская епархия, Azerbaijani: Bakı və Azərbaycan yeparxiyası) is a diocese of the Russian Orthodox Church in Azerbaijan.

The first Russian Orthodox church in Baku was built in 1815,[1] two years after the Russo-Persian War (1804-1813) and the out coming Treaty of Gulistan, by which Qajar Iran ceded swaths of its Caucasian territories to Russia, which included Baku.

[3] Russian Orthodox churches had been built in Ganja and Şamaxı previously.

[1] Since the entire region of Caucasus was under the Russian rule, jurisdiction of Georgian Exarchate was expanded, encompassing territories of modern-day Georgia, Armenia and Azerbaijan.

[1] In 2011, ecclesiastical jurisdiction of the local Russian eparchy (diocese) was adjusted to political borders of Azerbaijan, and official name was changed to Russian Orthodox Eparchy of Baku and Azerbaijan.