St. Clair is located in Butler County, Ohio. St. Clair has a 2025 population of 6,962 . St. Clair is currently growing at a rate of 1.1% annually and its population has increased by 4% since the most recent census, which recorded a population of 6,694 in 2020.
The average household income in St. Clair is $81,917 with a poverty rate of 14.71%. The median age in St. Clair is 38.8 years: 39.7 years for males, and 38.2 years for females. For every 100 females there are 102.8 males.
Data after 2023 is projected based on recent change
The racial composition of St. Clair includes 93.3% White, and smaller percentages for Black or African American, Asian, Native American and multiracial populations.
White (93.3%)
Two or more races (5.17%)
Black or African American (1.46%)
Asian (0.04%)
Native American (0.03%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 6,264 | 93.3% |
| Two or more races | 347 | 5.17% |
| Black or African American | 98 | 1.46% |
| Asian | 3 | 0.04% |
| Native American | 2 | 0.03% |
Married
Widowed
Divorced
Separated
Never Married
St. Clair's average per capita income is $43,648. Household income levels show a median of $67,365. The poverty rate stands at 14.71%.
Name | Median | Mean |
|---|---|---|
| Married Families | $75,192 | - |
| Families | $67,807 | $83,555 |
| Households | $67,365 | $81,917 |
| Non Families | $41,111 | $63,140 |
Average Income
Median Household Income
Poverty Rate