| Mount Lonarch | |
| State: | vic |
| Type: | town |
| Lga: | Pyrenees Shire |
| Coordinates: | -37.2683°N 143.3747°W |
| Use Lga Map: | yes |
| Postcode: | 3468 |
| Pushpin Label Position: | left |
| Pop: | 42 |
| Elevation: | 721 |
| Stategov: | Ripon |
| Fedgov: | Wannon |
| Dist1: | 177 |
| Dir1: | NW |
| Location1: | Melbourne |
| Dist2: | 65 |
| Dir2: | NW |
| Location2: | Ballarat |
| Dist3: | 22 |
| Dir3: | N |
| Location3: | Beaufort |
Mount Lonarch is a locality in central Victoria, Australia. The locality is in the Shire of Pyrenees local government area, 177km (110miles) north west of the state capital, Melbourne.
At the, Mount Lonarch had a population of 42.