Port Kirwan is a small incorporated fishing community located on the southern shore of the Avalon Peninsula, Newfoundland, Canada.

In the 2021 Census of Population conducted by Statistics Canada, Port Kirwan had a population of 49 living in 30 of its 53 total private dwellings, a change of -5.8% from its 2016 population of 52.

With a land area of 8.84 km2 (3.41 sq mi), it had a population density of 5.5/km2 (14.4/sq mi) in 2021.

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