Grand River 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, Grand River had a population of 757 living in 276 of its 282 total private dwellings, a change of -2.7% from its 2016 population of 778.
With a land area of 3.79 km2 (1.46 sq mi), it had a population density of 199.7/km2 (517.3/sq mi) in 2021.
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