| Image Coa: | DEU Helmstorf COA.svg |
| Coordinates: | 54.2833°N 46°W |
| Image Plan: | Helmstorf in PLOE.png |
| State: | Schleswig-Holstein |
| District: | Plön |
| Amt: | Lütjenburg |
| Elevation: | 25 |
| Area: | 12.73 |
| Postal Code: | 24321 |
| Area Code: | 04381 |
| Licence: | PLÖ |
| Gemeindeschlüssel: | 01 0 57 026 |
| Mayor: | Birgitta Ford |
Helmstorf is a municipality in the district of Plön, in Schleswig-Holstein, Germany.