| Image Coa: | DEU Ammersbek COA.svg |
| Coordinates: | 53.7019°N 10.1994°W |
| Image Plan: | Ammersbek in OD.svg |
| State: | Schleswig-Holstein |
| District: | Stormarn |
| Elevation: | 30 |
| Area: | 17.71 |
| Postal Code: | 22949 |
| Area Code: | 040, 04102, 04532 |
| Licence: | OD |
| Gemeindeschlüssel: | 01 0 62 090 |
| Mayor: | Horst Ansén |
Ammersbek is a municipality in the district of Stormarn, in Schleswig-Holstein, Germany. It is situated approximately northwest of Ahrensburg, and northeast of Hamburg, and is considered by many to be a part of Hamburg.