Lower Newcastle-RussellvilleLower Newcastle-Russellville was a local service district in New Brunswick. It is now part of the Greater Miramichi rural district.DemographicsIn the 2021 Census of Population conducted by Statistics Canada, Lower Newcastle-Russellville part B had a population of 369 living in 171 of its 198 total private dwellings, a change of from its 2016 population of 352. With a land area of, it had a population density of in 2021.