Maroa is a city in Macon County, Illinois, United States. Its population was 1,577 at the 2020 census, down from 1,801 in 2010. It is included in t…Maroa is a city in Macon County, Illinois, United States. Its population was 1,577 at the 2020 census, down from 1,801 in 2010. It is included in the Decatur, Illinois Metropolitan Statistical Area. The city was named after the Maroa people.
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