See of Thessalonica

Metropolis of Thessaloniki Ιερά Μητρόπολις Θεσσαλονίκης
Saint Gregory Palamas Metropolitan Cathedral
Location
Ecclesiastical province	Thessaloniki
Statistics
Parishes	43
Information
Cathedral	Saint Gregory Palamas Metropolitan Cathedral
Current leadership
Bishop	Anthimos Rousas ()
Website
https://www.imth.gr

The Metropolis of Thessaloniki (Greek: Ιερά Μητρόπολις Θεσσαλονίκης) is a Greek Orthodox metropolitan see based in the city of Thessaloniki in Central Macedonia, Greece. It is part of the so-called "New Lands", belonging to the jurisdiction of the Ecumenical Patriarchate of Constantinople but being administered by the Church of Greece. The see traces its history to its foundation by the Apostle Paul in the 1st century. Since 2004, the incumbent metropolitan is Anthimos Rousas ().

In its early centuries, the see of Thessalonica was subordinated to the Patriarch of Rome, rising to become the archbishopric of the Eastern Illyricum. Roman control—and the use of Latin—continued until ca. 733, when the see was transferred to the jurisdiction of the Patriarch of Constantinople. Under Constantinople, it was reduced in status to a "simple" metropolitan see, with 5 to 12 suffragan sees, although the metropolitans continued to use the title of "archbishop" as well.