What is the population of Williamson County, IL?
Williamson County in Illinois has a population of 66,902, per Census ACS 5-Year estimates. The median household income is $65,521 and the median age is 41.4.
Context
Counties are the primary administrative subdivisions of states and a stable unit for tracking population. Williamson County's population reflects everyone within county lines, including residents of incorporated cities and unincorporated areas.
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Williamson County in Illinois has a population of 66,902, per Census ACS 5-Year estimates. The median household income is $65,521 and the median age is 41.4.