| Country: | Scotland |
| Coordinates: | 58.0012°N -4.2422°W |
| Map Type: | Sutherland |
| Official Name: | Ardachu |
| Unitary Scotland: | Highland |
| Lieutenancy Scotland: | Sutherland |
| Constituency Westminster: | Caithness, Sutherland and Easter Ross |
| Constituency Scottish Parliament: | Caithness, Sutherland and Ross |
| Postcode District: | IV28 3 |
| Postcode Area: | IV |
| Os Grid Reference: | NC6703 |
Ardachu (gd|Àrd Achadh) is a village within the area of Rogart, Sutherland in the Scottish Highlands, within the Highland Council area.[1] [2] It lies on the River Fleet, west of Rogart.