| Type: | Ortsteil |
| Town: | Arendsee |
| Image Coa: | DE-ST 15-0-81-030 Mechau COA.png |
| Coordinates: | 52.87°N 11.35°W |
| State: | Sachsen-Anhalt |
| District: | Altmarkkreis Salzwedel |
| Elevation: | 24 |
| Area: | 14.92 |
| Population: | 273 |
| Stand: | 2009-12-31 |
| Postal Code: | 39619 |
| Area Code: | 039036 |
| Licence: | SAW |
Mechau is a village and a former municipality in the district Altmarkkreis Salzwedel, in Saxony-Anhalt, Germany. Since 1 January 2011, it is part of the town Arendsee.