Williamson County, Tennessee Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Williamson County, TN Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A
Health Above averageHealthiest county in Tennessee
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A+
Income Top gradeWealthiest county in Tennessee
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A+
Education Top gradeBest educated county in Tennessee
Source: Map AI Methodology
Population: density and quick facts
| Metric | Williamson County | Tennessee Avg | U.S. Average |
|---|---|---|---|
| Population | 260,351 | 7,058,506 | 337,468,954 |
| Population density (per sq mi) | 446.1 | 167.5 | 86.4 |
| Population growth (%/yr) | 2.99% | 0.94% | 0.59% |
| Median age | 40.7 | 37.3 | 37.3 |
| Households | 92,212 | 2,819,839 | 130,235,071 |
Population in Williamson County grew by 57.2% from 2009 to 2024, reaching 260,351 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Williamson County is Gen X, aged 45–60, at 24.1% of residents. That is 3.8 points above Tennessee as a whole.
- Gen Z 13–28 49,929 19.2% -2.2 pts
- Millennials 29–44 55,227 21.2% -0.3 pts
- Gen X 45–60 62,696 24.1% +3.8 pts
- Boomers 61–79 36,339 14.0% -3.4 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Tennessee, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 50.9% of the people living in Williamson County and men 49.1%.
- Women 50.9% Tennessee 50.9%
- Men 49.1% Tennessee 49.1%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Williamson County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Williamson County has a the economy index of A+, which means it is exceptionally prosperous.
| Metric | Williamson County | Tennessee Avg | U.S. Average |
|---|---|---|---|
| Median household income | $135,891 | $69,901 | $80,455 |
| Income growth (%/yr) | 3.91% | 5.19% | 4.80% |
| Unemployment rate | 2.4% | 4.6% | 5.2% |
The median household income in Williamson County is about 94% higher than in Tennessee.
Housing
| Metric | Williamson County | Tennessee Avg | U.S. Average |
|---|---|---|---|
| Median home price | $645,556 | $255,786 | $248,835 |
| Median rent | $1,968 | $1,188 | $1,407 |
| Homeownership rate | 78.8% | 66.9% | 65.2% |
The median home price in Williamson County is about 27.3 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,968 per month for that long.
Commute Time & Mobility
Commuters in Williamson County spend about 52 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 217 hours, about 9.0 full days, spent commuting.
| Metric | Williamson County | Tennessee Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 26.0 | 22.4 | 22.4 |
| Round-trip commute (min) | 52.0 | 44.8 | 44.8 |
| Yearly time spent (hours) | 217 | 187 | 187 |
| Estimated yearly cost | $6,721 | $5,785 | $5,790 |
| Work from home | 28.3% | 12.9% | 15.0% |
| Highway traffic (vehicles/day) | 9,902 | 9,259 | 8,813 |
| Local road traffic (vehicles/day) | 2,142 | 1,225 | 1,355 |
Fastest commutes among counties in
Tennessee:
Dyer County (15.9 min), Henry County (16.7 min), Obion County (17.1 min).
Slowest:
Cannon County (33.3 min), Union County (33.2 min), Fayette County (33.1 min).
The average commute time in Williamson County is 26 minutes, longer than the 22 minutes in Tennessee.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Williamson County has a education index of A+, which means it is exceptionally educated.
| Metric | Williamson County | Tennessee Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 57.6% | 27.5% | 31.6% |
| Average household size | 2.81 | 2.45 | 2.53 |
Highest education index among counties in
Tennessee:
Williamson County (0.4), Davidson County (0.3), Knox County (0.3).
Lowest:
Lake County (0.1), Van Buren County (0.1), Lauderdale County (0.1).
Health
Williamson County has a health index of A, which means it is very healthy.
| Metric | Williamson County | Tennessee Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 81.2 | 74.8 | 78.3 |
| Self-rated poor health | 9.9% | 19.5% | 16.3% |
| Smokers | 13.4% | 25.1% | 19.0% |
Highest health index among counties in
Tennessee:
Williamson County (0.8), Rutherford County (0.8), Wilson County (0.8).
Lowest:
Clay County (0.8), Lake County (0.8), Hancock County (0.8).
Williamson County, TN Compared With Nearby Counties
Williamson County, TN is the 3rd largest of the 6 counties compared here, 260,351 residents against a local median of 107,806. The measure that sets Williamson County, TN apart most is median home price: $645,556, 207% above the local median of $210,112.
Median household income tells the same story from another angle: $135,891 against a local median of $78,256, 74% above it. The one measure here that carries a verdict is median household income, and at 74% above the local median it puts Williamson County, TN at the better end of the local range. The counties themselves spread $410,846 on median home price, so Williamson County, TN sits at one end of an already wide local range rather than apart from it. Williamson County, TN has the highest median home price of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Williamson County, TN | 260,351 | $135,891 #1/6 | $645,556 #1/6 | 26.0 min #3/6 |
| Davidson County, TN | 713,477 | $78,256 | $479,049 | 22.6 min |
| Maury County, TN | 107,806 | $76,039 | $197,300 | 27.5 min |
| Cheatham County, TN | 41,825 | $89,427 | $68,203 | 32.4 min |
| Marshall County, TN | 36,049 | $71,109 | $210,112 | 28.1 min |
| Rutherford County, TN | 357,384 | $85,930 | $382,437 | 23.6 min |
Frequently Asked Questions
Common questions about Williamson County, Tennessee.
How many people live in Williamson County, Tennessee?
About 260,351 people live in Williamson County, Tennessee, in 92,212 households of 2.8 people on average. The median age is 40.7, so residents are older than the U.S. median of 37.3 by about 3 years.
How densely populated is Williamson County, Tennessee?
Averaged over its land area, Williamson County, Tennessee has 446 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 5.2 times the U.S. average of 86.
Is Williamson County, Tennessee an affordable place to live?
The median home costs 4.8 times the median household income ($645,556 against $135,891), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,968 a month takes about 17% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is it hard to find a job in Williamson County, Tennessee?
Unemployment in Williamson County, Tennessee is only 2.4%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How educated are people in Williamson County, Tennessee?
57.6% of adults in Williamson County, Tennessee hold a bachelor's degree or higher (about 6 in 10), well above the U.S. share of 31.6%.
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