The Metropolis of Argolis is a diocese of the Church of Greece, with its seat at Nafplio, covering the historical Argolid (Argolis). It occupies the current boundaries of the modern Prefecture of Argolis, except for the municipality of Ermionida.

The Church of Greece, part of the wider Greek Orthodox Church, is one of the autocephalous churches which make up the communion of Eastern Orthodox Christianity. Its canonical territory is confined to the borders of Greece prior to the Balkan Wars of 1912–1913, with the rest of Greece being subject to the jurisdiction of the Ecumenical Patriarchate of Constantinople. However, most of the dioceses of the Metropolises of the New Lands are de facto administered as part of the Church of Greece for practical reasons, under an agreement between the churches of Athens and Constantinople. The primate of the Church of Greece is the archbishop of Athens and All Greece.