Mercer County's estimated 2026 population is 42,954 with a growth rate of 0.51% in the past year according to the most recent United States census data. Mercer County is the 57th largest county in Ohio. The 2010 population was 40,791 and has seen a growth of 5.3% since that time.
Data after 2023 is projected based on recent change
Overall: 39.4 years
Female: 41 years
Male: 37.9 years
There are 31,674 adults, (8,142 of whom are seniors) in Mercer County.
Female: 20,964 (49.3%)
Male: 21,520 (50.7%)
The racial composition of Mercer County includes 94.89% White, and smaller percentages for Two or more races, Black or African American, other race, Asian, Native Hawaiian or Pacific Islander, Native American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 40,313 | 94.89% |
| Two or more races | 1,016 | 2.39% |
| Black or African American | 513 | 1.21% |
| Other race | 373 | 0.88% |
| Asian | 201 | 0.47% |
| Native Hawaiian or Pacific Islander | 45 | 0.11% |
| Native American | 23 | 0.05% |
Mercer County's average per capita income is $50,142. Household income levels show a median of $76,782. The poverty rate stands at 7.29%.
Name | Median | Mean |
|---|---|---|
| Married Families | $109,026 | - |
| Families | $97,121 | $107,479 |
| Households | $76,782 | $91,265 |
| Non Families | $45,280 | $56,680 |
Average Income
Median Household Income
Poverty Rate
