Williamson County's estimated 2025 population is 271,904 with a growth rate of 1.39% in the past year according to the most recent United States census data. Williamson County is the 6th largest county in Tennessee. The 2010 population was 184,082 and has seen a growth of 47.71% since that time.
Data after 2023 is projected based on recent change
The racial composition of Williamson County includes 82.79% White, 5.22% Asian, 3.8% Black or African American, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 210,781 | 82.79% |
| Two or more races | 17,025 | 6.69% |
| Asian | 13,292 | 5.22% |
| Black or African American | 9,676 | 3.8% |
| Other race | 3,338 | 1.31% |
| Native American | 428 | 0.17% |
| Native Hawaiian or Pacific Islander | 69 | 0.03% |
Married
Widowed
Divorced
Separated
Never Married
Williamson County's average per capita income is $75,237. Household income levels show a median of $131,202. The poverty rate stands at 4.51%.
Name | Median | Mean |
|---|---|---|
| Married Families | $168,733 | - |
| Families | $153,397 | $202,566 |
| Households | $131,202 | $177,673 |
| Non Families | $64,058 | $86,547 |
Average Income
Median Household Income
Poverty Rate
