Grand Barachois is an unincorporated place in New Brunswick, Canada. It is recognized as a designated place by Statistics Canada.
In the 2021 Census of Population conducted by Statistics Canada, Grand Barachois had a population of 3,087 living in 1,304 of its 1,593 total private dwellings, a change of from its 2016 population of 2,819. With a land area of , it had a population density of in 2021.