Armagh (2021 Population 1,439) 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.
In 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.
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