| Type: | town |
| Marchmont | |
| State: | nsw |
| Coordinates: | -34.8972°N 148.9431°W |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in New South Wales |
| Lga: | Yass Valley Council |
| County: | Murray |
| Parish: | Hume |
| Region: | Southern Tablelands |
| Postcode: | 2581 |
| Pop: | 229 |
| Elevation: | 523 |
| Stategov: | Goulburn |
| Fedgov: | Hume |
| Dist1: | 9 |
| Dir1: | SE |
| Location1: | Yass |
| Dist2: | 57 |
| Dir2: | NW |
| Location2: | Canberra |
| Dist3: | 280 |
| Dir3: | SW |
| Location3: | Sydney |
| Near-N: | Yass |
| Near-Ne: | Manton |
| Near-E: | Yass River |
| Near-Se: | Murrumbateman |
| Near-S: | Boambolo |
| Near-Sw: | Good Hope |
| Near-W: | Good Hope |
| Near-Nw: | Yass |
Marchmont is a locality in the Yass Valley Council, New South Wales, Australia. It lies on the Barton Highway about 10 km to the southeast of Yass. At the, it had a population of 229.
Marchmont has a number of heritage-listed sites, including: