| Image Coa: | Hanerau-Hademarschen Wappen.png |
| Coordinates: | 54.1286°N 9.4161°W |
| Image Plan: | Hanerau-Hademarschen in RD.png |
| State: | Schleswig-Holstein |
| District: | Rendsburg-Eckernförde |
| Amt: | Mittelholstein |
| Elevation: | 38 |
| Area: | 14.63 |
| Postal Code: | 25557 |
| Area Code: | 04872 |
| Licence: | RD |
| Gemeindeschlüssel: | 01 0 58 072 |
| Mayor: | Thomas Deckner |
| Party: | CDU |
Hanerau-Hademarschen is a municipality in the district of Rendsburg-Eckernförde, in Schleswig-Holstein, Germany. It is situated near the Kiel Canal, approx. 25 km southwest of Rendsburg.
Hanerau-Hademarschen was until 2008 the seat of the Amt ("collective municipality") Hanerau-Hademarschen. Now the seat of the Amt is Hohenwestedt which is outside the area of Hanerau-Hademarschen.