Williamson County
Williamson County is significantly wealthier than the US average, with a median household income of $135,594. The county has more than doubled in size since 2000, adding 133,713 residents. 63% of adults hold a bachelor's degree or higher, well above the national rate of 36%. Median home value has more than tripled since 2000, reaching $751,900. Poverty is rare here, at 4.6% of residents. It ranks in the top 1% of US counties for household income.
Population & growth
PEP 2025 EST:272,061 residents (Census Bureau Vintage 2025, released March 2026)
Income & economy
Housing
Race & ethnicity
Detailed origins & ancestry
+ 9 more hispanic origin groups with data
+ 4 more asian origin groups with data
+ 41 more ancestry groups with data
Education
Commute & transportation
Work & employment
People & community
Places similar to Williamson County
Compare Williamson County to nearby counties
How many people live in Williamson County, Tennessee?
Williamson County, Tennessee has about 260,351 residents according to the 2024 American Community Survey.
What is the median household income in Williamson County, Tennessee?
The typical household in Williamson County, Tennessee earns about $135,594 a year. Half of households make more than that, and half make less.
Is Williamson County, Tennessee expensive?
In Williamson County, Tennessee, the median home is worth about $751,900, and the typical rent is about $1,969 a month.
How educated are people in Williamson County, Tennessee?
About 62.7% of adults age 25 and over in Williamson County, Tennessee hold a bachelor's degree or higher.
What is the poverty rate in Williamson County, Tennessee?
About 4.6% of people in Williamson County, Tennessee live below the federal poverty line.
Has Williamson County, Tennessee grown since 1990?
Yes, Williamson County, Tennessee has grown since 1990. The population has added about 179,330 residents, a change of about 221 percent over that period.
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024