Dietrich of Metz (died 984) was Bishop of Metz from 964 until his death. He was the son of Hedwig of Nordgau and Siegfried of Luxembourg.
He succeeded Adalbero I (929–962) as bishop of Metz. He founded the abbey of St Vincent, Metz.
He crowned Charles, Duke of Lower Lorraine as King of France in Laon in 978; Charles, unsuccessful in gaining recognition subsequently, was supported by Otto II, Holy Roman Emperor (a Saxon like Dietrich, and a relation). Bruno I, Archbishop of Cologne was another cousin, and a friend.
Sigebert of Gembloux and Alpert of Metz wrote biographies of him.