Franklin County
Franklin County has notably lower household income than the US average, with a median household income of $56,740. Population has declined 4% since 2000. 16% of adults hold a bachelor's degree or higher, below the national rate of 36%. Median home value has more than doubled since 2000, reaching $89,000. Households here earn about 32% less than the Illinois median.
Population & growth
PEP 2025 EST:36,916 residents (Census Bureau Vintage 2025, released March 2026)
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How many people live in Franklin County, Illinois?
Franklin County, Illinois has about 37,323 residents according to the 2024 American Community Survey.
What is the median household income in Franklin County, Illinois?
The typical household in Franklin County, Illinois earns about $56,740 a year. Half of households make more than that, and half make less.
Is Franklin County, Illinois expensive?
In Franklin County, Illinois, the median home is worth about $89,000, and the typical rent is about $803 a month.
How educated are people in Franklin County, Illinois?
About 15.8% of adults age 25 and over in Franklin County, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Franklin County, Illinois?
About 17.5% of people in Franklin County, Illinois live below the federal poverty line.
Has Franklin County, Illinois grown since 1990?
Yes, Franklin County, Illinois has shrunk since 1990. The population has lost about 2,996 residents, a change of about -7 percent over that period.
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024