Seneca County's estimated 2026 population is 54,350 with a growth rate of -0.32% in the past year according to the most recent United States census data. Seneca County is the 47th largest county in Ohio. The 2010 population was 56,619 and has seen a growth of -4.01% since that time.
Data after 2023 is projected based on recent change
Overall: 40.2 years
Female: 41.4 years
Male: 38.8 years
There are 43,042 adults, (10,538 of whom are seniors) in Seneca County.
Female: 27,286 (49.8%)
Male: 27,484 (50.2%)
The racial composition of Seneca County includes 89.58% White, and smaller percentages for Black or African American, other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 49,062 | 89.58% |
| Two or more races | 2,771 | 5.06% |
| Black or African American | 1,358 | 2.48% |
| Other race | 1,159 | 2.12% |
| Asian | 301 | 0.55% |
| Native American | 107 | 0.2% |
| Native Hawaiian or Pacific Islander | 12 | 0.02% |
Seneca County's average per capita income is $45,760. Household income levels show a median of $66,025. The poverty rate stands at 11.92%.
Name | Median | Mean |
|---|---|---|
| Married Families | $97,949 | $112,001 |
| Families | $80,501 | $97,225 |
| Households | $66,025 | $82,475 |
| Non Families | $36,547 | $51,394 |
Average Income
Median Household Income
Poverty Rate
