St. Clair is located in Columbiana County, Ohio. St. Clair has a 2025 population of 7,559 . St. Clair is currently declining at a rate of -0.42% annually and its population has decreased by -2.75% since the most recent census, which recorded a population of 7,773 in 2020.
The average household income in St. Clair is $79,247 with a poverty rate of 7.18%. The median age in St. Clair is 51.3 years: 44.8 years for males, and 56.3 years for females. For every 100 females there are 99.0 males.
Data after 2023 is projected based on recent change
The racial composition of St. Clair includes 93.46% White, and smaller percentages for Black or African American and multiracial populations.
White (93.46%)
Two or more races (5.15%)
Black or African American (1.38%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 7,222 | 93.46% |
| Two or more races | 398 | 5.15% |
| Black or African American | 107 | 1.38% |
Married
Widowed
Divorced
Separated
Never Married
St. Clair's average per capita income is $36,591. Household income levels show a median of $61,780. The poverty rate stands at 7.18%.
Name | Median | Mean |
|---|---|---|
| Married Families | $90,087 | - |
| Families | $87,587 | $101,303 |
| Households | $61,780 | $79,247 |
| Non Families | $36,402 | $40,379 |
Average Income
Median Household Income
Poverty Rate