Upper North Sydney is a community in the Canadian province of Nova Scotia, located in the Cape Breton Regional Municipality on Cape Breton Island.
In the 2021 Census of Population conducted by Statistics Canada, Upper North Sydney had a population of 387 living in 165 of its 182 total private dwellings, a change of from its 2016 population of 406. With a land area of, it had a population density of in 2021.[1]