Armagh, QuebecArmagh is a municipality in the Bellechasse Regional County Municipality in the Chaudière-Appalaches region of Quebec. Its coordinates are.It was named after Armagh in Northern Ireland.DemographicsIn the 2021 Census of Population conducted by Statistics Canada, Armagh had a population of living in of its total private dwellings, a change of from its 2016 population of. With a land area of, it had a population density of in 2021.