| Geest und Marsch Südholstein | |
| 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: | Moorrege |
| Leader Title: | Amtsvorsteher |
| Leader Name: | Rainer Jürgensen |
| Area Total Km2: | 137,7 |
| Population Total: | 23.769 |
| Population As Of: | 2020-12-31 |
| Website: | www.amt-geest-und-marsch-suedholstein.de |
Geest und Marsch Südholstein (before 1 January 2017: Moorrege) is an Amt ("collective municipality") in the district of Pinneberg, in Schleswig-Holstein, Germany. The seat of the Amt is in Moorrege.
The Amt Geest und Marsch Südholstein consists of the following municipalities: