Metropolitan Hierotheos (Greek: Μητροπολίτης Ιερόθεος, born Georgios Vlachos. Greek: Γεώργιος Βλάχος) is a Greek metropolitan and theologian.
He was born in 1945 in Ioannina, Greece. He graduated from the Theological School of the University of Thessaloniki and was ordained priest in 1972 and bishop in 1995. His diocese is the Metropolis of Nafpaktos and Agios Vlasios.
His book, The Person in the Orthodox Tradition, was awarded the first prize for the "top theological work written in Greece in 1991–96" by the Academy of Athens.