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All Williamson County population data above are from the US Census Bureau.
The population data for Williamson County are from the Census' American Community Survey 2018 5-year estimates and the Census' 2019 Population Estimates. The demographic data for Montgomery County, Sumner County, Sumner County, and Wilson County are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2018 5-year estimates, and were downloaded on 19 December 2019. Check out our FAQ section for more details.
With 238,412 people, Williamson County is the 6th most populated county in the state of Tennessee out of 95 counties. But watch out, Williamson County, because Montgomery County with 208,993 people and Sumner County with 191,283 people are right behind you.
The largest Williamson County racial/ethnic groups are White (85.0%) followed by Hispanic (4.7%) and Black (4.2%).
In 2018, the median household income of Williamson County residents was $109,026. Williamson County households made slightly more than Sumner County households ($64,631) and Wilson County households ($71,513) . However, 4.3% of Williamson County residents live in poverty.
The median age for Williamson County residents is 39.2 years young.
86% of people CANNOT find the data they're looking for on the US Census Bureau website. Source: Nielsen Norman Group
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