Big River is a Canadian rural community in Gloucester County, New Brunswick. It is the northernmost community in the local service district of Big River, which had a population of 721 inhabitants in 2016.
In the 2021 Census of Population conducted by Statistics Canada, Big River had a population of 791 living in 349 of its 372 total private dwellings, a change of from its 2016 population of 721. With a land area of , it had a population density of in 2021.