Population 672,688 · Census ACS 2020–24
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Population and households in Williamson County
Household size in Williamson County
| Period | Williamson County | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.80 | 2.69 | 2.87 | 2.68 |
| 2010–14 | 2.94 | 2.79 | 2.93 | 2.73 |
| 2015–19 | 3.09 | 2.83 | 2.95 | 2.71 |
| 2020–24 | 2.74 | 2.55 | 2.83 | 2.65 |
| Change | −0.06 | −0.14 | −0.05 | −0.03 |
The typical household in Williamson County holds 2.74 people, slightly more than the U.S. average of 2.65. Household size has edged down from 2.80 in 2006–10, as it has nationally. Households are largest in the east and smallest in the north.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Williamson County
| Period | Williamson County | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 35.1 | 34.0 | 34.7 | 37.7 |
| 2010–14 | 36.1 | 35.2 | 35.4 | 38.6 |
| 2015–19 | 37.3 | 36.3 | 36.1 | 39.6 |
| 2020–24 | 37.9 | 37.2 | 36.7 | 40.1 |
| Change | +2.9 | +3.3 | +2.0 | +2.3 |
The median resident of Williamson County is 37.9 years old, a few years younger than the national median of 40.1. The median age has climbed from 35.1 in 2006–10, mirroring the country. The youngest areas are in the west, the oldest in the north.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Williamson County
| Period | Williamson County | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 11.3% | 11.8% | 13.7% | 12.3% |
| 2010–14 | 10.5% | 11.2% | 13.7% | 12.3% |
| 2015–19 | 9.8% | 9.8% | 13.1% | 11.6% |
| 2020–24 | 9.4% | 9.7% | 12.9% | 11.6% |
| Change | −1.9 pts | −2.2 pts | −0.8 pts | −0.6 pts |
Single-parent households are less common in Williamson County than nationally: 9.4%, against 11.6%. The picture is much the same across the Austin area. Since 2006–10, the single-parent share has fallen 1.9 points, mirroring the country.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Williamson County
Renters in Williamson County
| Period | Williamson County | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 29.7% | 40.7% | 35.2% | 33.3% |
| 2010–14 | 31.9% | 42.1% | 37.3% | 35.6% |
| 2015–19 | 31.6% | 41.8% | 38.0% | 36.0% |
| 2020–24 | 33.6% | 41.7% | 37.4% | 34.8% |
| Change | +3.9 pts | +1.0 pts | +2.3 pts | +1.5 pts |
About a third of households in Williamson County rent their homes (33.6%), close to the national share of 34.8%. Renters make up a smaller share here than in the wider Austin area (41.7%). Among homeowners, 28.5% have no mortgage at all, well below the national share of 39.8%. The renter share has risen 3.9 points since 2006–10, as it has nationally.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Williamson County
| Period | Williamson County | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.2% | 8.8% | 11.8% | 11.4% |
| 2010–14 | 7.0% | 8.5% | 10.9% | 11.4% |
| 2015–19 | 7.4% | 8.3% | 10.9% | 11.1% |
| 2020–24 | 4.9% | 5.9% | 9.4% | 9.6% |
| Change | −2.3 pts | −2.9 pts | −2.4 pts | −1.8 pts |
Only 4.9% of homes in Williamson County are vacant, far below the national rate of 9.6%, which usually means strong demand for housing. Vacancy is down 2.3 points from 2006–10, as it has nationally. Williamson County has the lowest vacancy rate of any Texas county.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Williamson County
| Period | Williamson County | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 1995 | 1990 | 1983 | 1974 |
| 2010–14 | 1997 | 1992 | 1985 | 1975 |
| 2015–19 | 2000 | 1995 | 1987 | 1977 |
| 2020–24 | 2005 | 2000 | 1992 | 1980 |
| Change | +10 | +10 | +8 | +6 |
Williamson County has newer housing than the country as a whole: the median home was built in 2005, versus 1980 nationally. The median year built has moved up from 1995 in 2006–10, a sign of steady new building. Newer construction is concentrated in the northwest, while the south has the oldest housing. Only one other Texas county has newer homes.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Williamson County
| Period | Williamson County | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,128 | $1,064 | $921 | $965 |
| 2010–14 | $1,224 | $1,155 | $1,005 | $1,040 |
| 2015–19 | $1,511 | $1,428 | $1,178 | $1,213 |
| 2020–24 | $2,004 | $1,911 | $1,560 | $1,571 |
| Change | +$877 | +$847 | +$639 | +$606 |
The median renter in Williamson County pays $2,004 a month for rent and utilities, well above the national median of $1,571. Rent has climbed $877 a month since 2006–10, up 78%, faster than rents rose nationally. The typical renter here spends 29.6% of household income on rent, just under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Renters on a budget will find the lowest rents in the northwest; the highest are in the center.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Williamson County
Bachelor's degrees in Williamson County
| Period | Williamson County | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 37.8% | 38.3% | 27.0% | 28.4% |
| 2010–14 | 38.9% | 40.3% | 27.9% | 29.6% |
| 2015–19 | 42.2% | 44.2% | 30.0% | 32.1% |
| 2020–24 | 49.1% | 50.4% | 34.0% | 35.6% |
| Change | +11.3 pts | +12.1 pts | +7.1 pts | +7.2 pts |
College graduates are unusually common in Williamson County: 49.1% of adults 25 and older have a bachelor's degree or higher, against 35.6% nationally. Education tends to track local incomes and the kinds of jobs nearby. Since 2006–10, the share with a degree has risen 11.3 points, mirroring the country. Only five of Texas' 254 counties have a higher share of college graduates.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Williamson County
| Period | Williamson County | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 92.3% | 87.6% | 80.7% | 84.9% |
| 2010–14 | 92.7% | 88.3% | 82.0% | 86.1% |
| 2015–19 | 93.6% | 89.9% | 83.6% | 87.7% |
| 2020–24 | 94.3% | 91.6% | 85.8% | 89.3% |
| Change | +2.1 pts | +4.0 pts | +5.1 pts | +4.3 pts |
High school completion is high in Williamson County: 94.3% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The share with a diploma has risen 2.1 points since 2006–10, as it has nationally. Only six of Texas' 254 counties have a higher share of high school graduates.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Williamson County
| Period | Williamson County | Austin area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 6.2% | 6.4% | 7.0% | 8.1% |
| 2010–14 | 6.7% | 6.9% | 7.7% | 9.4% |
| 2015–19 | 4.6% | 4.3% | 5.1% | 5.6% |
| 2020–24 | 3.8% | 4.3% | 5.3% | 5.4% |
| Change | −2.4 pts | −2.2 pts | −1.7 pts | −2.7 pts |
Jobs have been easier to find in Williamson County than nationally: unemployment was 3.8%, against 5.4%. Since 2006–10, unemployment has fallen 2.4 points, mirroring the country. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Williamson County compared with nearby counties
| County | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Williamson County | 2.74 | 37.9 | 9.4% | 33.6% | 4.9% | 2005 | $2,004 | 49.1% | 94.3% | 3.8% |
| Burnet County | 2.49 | 45.5 | 8.3% | 23.7% | 15.2% | 1995 | $1,242 | 27.9% | 88.6% | 2.7% |
| Llano County | 2.14 | 54.7 | 9.7% | 23.5% | 27.8% | 1990 | $1,091 | 31.8% | 90.0% | 3.8% |
| Burleson County | 2.37 | 45.3 | 10.1% | 18.3% | 17.3% | 1990 | $1,145 | 23.8% | 87.1% | 5.1% |
| Brazos County | 2.48 | 30.1 | 10.7% | 53.2% | 11.6% | 1998 | $1,405 | 50.2% | 91.1% | 6.7% |
| Grimes County | 2.73 | 40.4 | 8.9% | 20.1% | 16.8% | 1997 | $1,082 | 21.4% | 81.1% | 5.0% |
| Kimble County | 2.16 | 48.3 | 5.7% | 21.1% | 22.9% | 1983 | $713 | 27.2% | 79.1% | 1.2% |
| San Jacinto County | 2.67 | 45.7 | 12.8% | 15.4% | 25.8% | 1993 | $1,015 | 15.2% | 81.0% | 6.6% |
| Sutton County | 2.63 | 40.1 | 12.0% | 24.0% | 23.5% | 1973 | $764 | 19.5% | 82.8% | 1.7% |
| Newton County | 2.55 | 46.3 | 11.0% | 17.1% | 21.4% | 1990 | $1,004 | 7.4% | 85.3% | 8.1% |
| Allen Parish | 2.47 | 36.9 | 16.6% | 26.0% | 17.5% | 1982 | $728 | 12.9% | 81.2% | 8.3% |
All figures 2020–24.
Counties with similar populations: Will County, IL · Tulsa County, OK · Adams County, CO · Kent County, MI · Johnson County, KS · Providence County, RI · Jefferson County, AL · Washington County, OR · Douglas County, NE · District of Columbia, DC
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Williamson County. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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