Resident Population in Marion County, IL

Resident Population in Marion County, IL was 36.43700 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Marion County, IL reached a record high of 44.53400 in January of 1981 and a record low of 36.43700 in January of 2024. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Marion County, IL - last updated from the United States Federal Reserve on April of 2026.



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