Blackstock is an unincorporated community in Ontario, Canada.
It is recognized as a designated place by Statistics Canada.
In the 2021 Census of Population conducted by Statistics Canada, Blackstock had a population of 786 living in 273 of its 284 total private dwellings, a change of 0.6% from its 2016 population of 781.
With a land area of 0.9 km2 (0.35 sq mi), it had a population density of 873.3/km2 (2,261.9/sq mi) in 2021.
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