The Chaldean Catholic Metropolitan Archeparchy of Tehran (Latin: Archidioecesis Teheranensis Chaldaeorum) is an Archeparchy (Eastern Archdiocese) of the Chaldean Catholic church (Syro-Oriental Rite) in Iran, with its archiepiscopal see, St. Joseph's Cathedral, in the national capital Tehran. Despite its Metropolitan rank, it has no suffragan.