In the 2021 Census of Population conducted by Statistics Canada, Cochrane Lake had a population of 767 living in 240 of its 252 total private dwellings, a change of  from its 2016 population of 799.
In the 2021 Census of Population conducted by Statistics Canada, Cochrane Lake's population was 767 people living in 240 out of its 252 private dwellings, a change from the 2016 count of 799.