Altenau-Schulenberg im Oberharz (since 2015) Buntenbock (since 1972) Clausthal-Zellerfeld Wildemann (since 2015) Clausthal-Zellerfeld originally consisted of two towns which were merged in 1924 to form an administrative unit.
Altenau-Schulenberg im Oberharz (aastast 2015) Buntenbock (aastast 1972) Clausthal-Zellerfeld Wildemann (aastast 2015) Clausthal-Zellerfeld koosnes algselt kahest linnast, mis ühendati 1924. aastal üheks haldusüksuseks.