| Image Coa: | DEU Dannau COA.svg |
| Coordinates: | 54.25°N 41°W |
| Image Plan: | Dannau in PLOE.png |
| State: | Schleswig-Holstein |
| District: | Plön |
| Amt: | Lütjenburg |
| Elevation: | 38 |
| Area: | 9.12 |
| Postal Code: | 24329 |
| Area Code: | 04383 |
| Licence: | PLÖ |
| Gemeindeschlüssel: | 01 0 57 013 |
| Mayor: | Roland Feichtner |
Dannau is a municipality in the district of Plön, in Schleswig-Holstein, Germany.