Barryville-New JerseyBarryville-New Jersey is an unincorporated community within the former Canadian local service district of the parish of Alnwick in Northumberland County, New Brunswick.DemographicsIn the 2021 Census of Population conducted by Statistics Canada, Barryville-New Jersey had a population of 214 living in 113 of its 124 total private dwellings, a change of from its 2016 population of 210. With a land area of, it had a population density of in 2021.