Harz National Park is a nature reserve in the German federal states of Lower Saxony and Saxony-Anhalt. It comprises portions of the western Harz mountain range, extending from Herzberg and Bad Lauterberg at the southern edge to Bad Harzburg and Ilsenburg on the northern slopes. 95 % of the area is covered with forests, mainly with spruce and beech woods, including several bogs, granite rocks and creeks. The park is part of the Natura 2000 network of the European Union.
The Harz National Park is recognised by the IUCN (World Conservation Union) as a national park (a Category II protected area in the IUCN system). The Harz National Park counts as a developing national park. Currently 60,3 per cent of the area of the park is designated as a natural biodiversity or core zone.
A proportion of the park counts as a utilisation zone. This covers areas that are important for tourism or are historico-culturally significant, such as the Brocken summit or mountain meadows. Here conservation measures will also be applied in future.