Williamson County, Texas Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Williamson County, TX Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
-
B
Health Around averageAmong the top 5 healthiest counties in Texas
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B
Income Around average
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B
Education Around average
Source: Map AI Methodology
Population: density and quick facts
| Metric | Williamson County | Texas Avg | U.S. Average |
|---|---|---|---|
| Population | 671,548 | 30,160,889 | 337,468,954 |
| Population density (per sq mi) | 593.5 | 112.2 | 86.4 |
| Population growth (%/yr) | 4.00% | 1.41% | 0.59% |
| Median age | 38.4 | 35.9 | 37.3 |
| Households | 251,945 | 10,982,153 | 130,235,071 |
Population in Williamson County grew by 80.4% from 2009 to 2024, reaching 671,548 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Williamson County is Millennials, aged 29–44, at 25.8% of residents. That is 2.9 points above Texas as a whole.
- Gen Z 13–28 137,490 20.5% -3.0 pts
- Millennials 29–44 173,087 25.8% +2.9 pts
- Gen X 45–60 133,717 19.9% +0.5 pts
- Boomers 61–79 83,311 12.4% -0.8 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 Texas, 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 50.6% of the people living in Williamson County and men 49.4%.
- Women 50.6% Texas 50.1%
- Men 49.4% Texas 49.9%
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 B, which means it is quite prosperous.
| Metric | Williamson County | Texas Avg | U.S. Average |
|---|---|---|---|
| Median household income | $112,429 | $78,939 | $80,455 |
| Income growth (%/yr) | 5.00% | 4.56% | 4.80% |
| Unemployment rate | 3.9% | 5.2% | 5.2% |
The median household income in Williamson County is about 42% higher than in Texas.
Housing
| Metric | Williamson County | Texas Avg | U.S. Average |
|---|---|---|---|
| Median home price | $411,695 | $258,873 | $248,835 |
| Median rent | $1,796 | $1,402 | $1,407 |
| Homeownership rate | 66.4% | 62.6% | 65.2% |
The median home price in Williamson County is about 19.1 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,796 per month for that long.
Commute Time & Mobility
Commuters in Williamson County spend about 51 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 214 hours, about 8.9 full days, spent commuting.
| Metric | Williamson County | Texas Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 25.7 | 22.8 | 22.4 |
| Round-trip commute (min) | 51.4 | 45.6 | 44.8 |
| Yearly time spent (hours) | 214 | 190 | 187 |
| Estimated yearly cost | $6,638 | $5,888 | $5,790 |
| Work from home | 25.4% | 14.4% | 15.0% |
| Highway traffic (vehicles/day) | 15,428 | 9,879 | 8,813 |
| Local road traffic (vehicles/day) | 2,889 | 1,441 | 1,355 |
Fastest commutes among counties in
Texas:
Loving County (3.2 min), King County (5.8 min), Terrell County (6.5 min).
Slowest:
Bandera County (38.6 min), San Jacinto County (35.9 min), Liberty County (33.6 min).
The average commute time in Williamson County is 26 minutes, longer than the 23 minutes in Texas.
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 B, which means it is quite educated.
| Metric | Williamson County | Texas Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 42.6% | 29.3% | 31.6% |
| Average household size | 2.64 | 2.69 | 2.53 |
Highest education index among counties in
Texas:
Collin County (0.4), Travis County (0.4), Fort Bend County (0.4).
Lowest:
Kenedy County (0.0), Hudspeth County (0.1), La Salle County (0.1).
Health
Williamson County has a health index of B, which means it is quite healthy.
| Metric | Williamson County | Texas Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 79.4 | 78.0 | 78.3 |
| Self-rated poor health | 12.2% | 21.1% | 16.3% |
| Smokers | 14.1% | 19.9% | 19.0% |
Highest health index among counties in
Texas:
Collin County (0.8), Travis County (0.8), Denton County (0.8).
Lowest:
Starr County (0.7), Brooks County (0.7), Presidio County (0.7).
Williamson County, TX Compared With Nearby Counties
Williamson County, TX is the 2nd largest of the 6 counties compared here, 671,548 residents against a local median of 106,582. The measure that sets Williamson County, TX apart most is median household income: $112,429, 41% above the local median of $79,463. That is the better end of the local range on this measure.
Median home price tells the same story from another angle: $411,695 against a local median of $315,151, 31% above it. The counties themselves spread $34,048 on median household income, so Williamson County, TX sits at one end of an already wide local range rather than apart from it. Williamson County, TX has the highest median household income of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Williamson County, TX | 671,548 | $112,429 #1/6 | $411,695 #1/6 | 25.7 min #5/6 |
| Travis County, TX | 1,315,315 | $100,128 | $348,613 | 22.7 min |
| Bell County, TX | 386,831 | $68,554 | $255,472 | 18.5 min |
| Burnet County, TX | 52,652 | $79,463 | $315,151 | 23.5 min |
| Bastrop County, TX | 106,582 | $86,230 | $366,980 | 32.7 min |
| Milam County, TX | 25,558 | $66,080 | $99,499 | 25.4 min |
Frequently Asked Questions
Common questions about Williamson County, Texas.
How big is Williamson County, Texas by population?
About 671,548 people live in Williamson County, Texas, in 251,945 households of 2.6 people on average. The median age is 38.4, close to the U.S. median of 37.3.
Is Williamson County, Texas urban or rural?
Averaged over its land area, Williamson County, Texas has 594 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 6.9 times the U.S. average of 86.
Can a typical household afford a home in Williamson County, Texas?
The median home costs 3.7 times the median household income ($411,695 against $112,429), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,796 a month takes about 19% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is unemployment high in Williamson County, Texas?
Unemployment in Williamson County, Texas is only 3.9%, 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, Texas?
42.6% of adults in Williamson County, Texas hold a bachelor's degree or higher (about 1 in 2), well above the U.S. share of 31.6%.
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