Williamstown is a city located in Grant County, Kentucky. Williamstown has a 2025 population of 3,986 . It is also the county seat of Grant County . Williamstown is currently growing at a rate of 0.38% annually and its population has increased by 1.97% since the most recent census, which recorded a population of 3,909 in 2020.
The average household income in Williamstown is $73,884 with a poverty rate of 10.74%. The median age in Williamstown is 33.9 years: 41.3 years for males, and 30.9 years for females. For every 100 females there are 84.8 males.
Data after 2023 is projected based on recent change
The racial composition of Williamstown includes 92.9% White, and smaller percentages for Black or African American and multiracial populations.
White (92.9%)
Two or more races (6.97%)
Black or African American (0.13%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 3,650 | 92.9% |
| Two or more races | 274 | 6.97% |
| Black or African American | 5 | 0.13% |
Married
Widowed
Divorced
Separated
Never Married
Williamstown's average per capita income is $45,521. Household income levels show a median of $71,761. The poverty rate stands at 10.74%.
Name | Median | Mean |
|---|---|---|
| Married Families | $96,712 | - |
| Families | $95,471 | $94,679 |
| Households | $71,761 | $73,884 |
| Non Families | $25,607 | $38,916 |
Average Income
Median Household Income
Poverty Rate