Big Bay is an unincorporated community in Marquette County of the U.S. state of Michigan. It is a census-designated place for statistical purposes and does not have any legal status as an incorporated municipality. As of the 2020 census, the CDP had a population of 257, down from 319 in 2010. The community is located within Powell Township near the sho…Big Bay is an unincorporated community in Marquette County of the U.S. state of Michigan. It is a census-designated place for statistical purposes and does not have any legal status as an incorporated municipality. As of the 2020 census, the CDP had a population of 257, down from 319 in 2010. The community is located within Powell Township near the shore of Big Bay on Lake Superior.
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