Williamson County's estimated 2025 population is 747,027 with a growth rate of 3.45% in the past year according to the most recent United States census data. Williamson County is the 12th largest county in Texas. The 2010 population was 426,568 and has seen a growth of 75.12% since that time.
Data after 2023 is projected based on recent change
The racial composition of Williamson County includes 63.81% White, 8.96% Asian, 6.9% Black or African American, 5% other race, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Asian
Black or African American
Other race
Native American
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 410,837 | 63.81% |
| Two or more races | 94,938 | 14.74% |
| Asian | 57,684 | 8.96% |
| Black or African American | 44,429 | 6.9% |
| Other race | 32,220 | 5% |
| Native American | 3,028 | 0.47% |
| Native Hawaiian or Pacific Islander | 753 | 0.12% |
Married
Widowed
Divorced
Separated
Never Married
Williamson County's average per capita income is $62,125. Household income levels show a median of $108,309. The poverty rate stands at 6.34%.
Name | Median | Mean |
|---|---|---|
| Married Families | $145,465 | $170,090 |
| Families | $129,273 | $153,927 |
| Households | $108,309 | $134,720 |
| Non Families | $64,859 | $84,780 |
Average Income
Median Household Income
Poverty Rate