Nikolai Gevorkovich Bayev (October 6, 1875, Astrakhan - August 5, 1952, Yerevan) was an Armenian architect in the Russian Empire.
He studied at the Saint Petersburg Institute of Civil Engineering. From 1911-1918 he worked as Major Engineer of Baku. During this period he constructed more than 100 buildings in Baku, including the Great Theatre of Mailian Brothers (modern days Azerbaijan State Opera Theatre, 1911), Sabunchinsky Railway Station, and a living sector in Armenikend rayon of Baku. In 1927 he moved to Yerevan, where constructed about 200 buildings, among them - Yerevan Pioneer's Palace, State Bank of Armenian SSR, Ministry of Justice, Yerevan Mechanical factory, old hall of Sundukyan Theatre, "Ararat" trest buildings, etc. He is also an author of buildings in Moscow and Tbilisi.