Rehna is a town in the Nordwestmecklenburg district, in Mecklenburg-Western Pomerania, Germany. It is situated 26 km southeast of Lübe…Rehna is a town in the Nordwestmecklenburg district, in Mecklenburg-Western Pomerania, Germany. It is situated 26 km southeast of Lübeck, and 28 km northwest of Schwerin. It is part of the Hamburg Metropolitan Region.