| Pinnau | |
| Native Name Lang: | de |
| Settlement Type: | Amt |
| Subdivision Type: | Country |
| Subdivision Name: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Schleswig-Holstein |
| Subdivision Type3: | District |
| Subdivision Name3: | Pinneberg |
| Seat Type: | Region seat |
| Seat: | Rellingen |
| Leader Title: | Amtsvorsteher |
| Leader Name: | Günther Hildebrand (FDP) |
| Area Total Km2: | 48,24 |
| Population Total: | 13.624 |
| Population As Of: | 2020-12-31 |
| Website: | www.amt-pinnau.de |
Pinnau is an Amt ("collective municipality") in the district of Pinneberg, in Schleswig-Holstein, Germany. The Amt Pinnau was formed in January 2007 by the merger of the Ämter Bönningstedt and Pinneberg-Land. The seat of the Amt is in Rellingen, itself not part of the Amt.
The Amt Pinnau consists of the following municipalities: