| Lac-Ernest | |
| Flag Size: | 120x100px |
| Pushpin Map: | Canada Central Quebec |
| Pushpin Map Caption: | Location in central Quebec. |
| Coordinates: | 46.1833°N -87°W |
| Subdivision Type: | Country |
| Established Title1: | Constituted |
| Established Date1: | January 1, 1986 |
| Area Total Km2: | 381.50 |
| Area Land Km2: | 343.36 |
| Population Footnotes: | [1] |
| Population Total: | 0 |
| Population As Of: | 2011 |
| Population Density Km2: | 0.0 |
| Population Blank1 Title: | Pop 2006-2011 |
| Population Blank1: | 0.0% |
| Population Blank2 Title: | Dwellings |
| Population Blank2: | 0 |
| Utc Offset: | −5 |
| Utc Offset Dst: | −4 |
| Blank Name: | Highways |
| Blank Info: | No major routes |
Lac-Ernest is an unorganized territory in the Laurentides region of Quebec, Canada. It is almost entirely within the Papineau-Labelle Wildlife Reserve.
In the early 1920s, the Singer Company, manufacturer best known for its sewing machines, began logging the area. This company built a railway from Thurso to southern Lake Montjoie in Lac-Ernest territory. Here a vast logging camp, known as "Camp 27", was established where logs were accumulated as far as the eye could see. In 1964, the MacLaren Company succeeded Singer and used the railroad until 1980 when it was dismantled and now functions as a rail trail.[2]
Population trend:[3]