Seneca County's estimated 2026 population is 54,934 with a growth rate of 0.19% 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 -2.98% since that time.
Data after 2023 is projected based on recent change
The racial composition of Seneca County includes 90.49% White, and smaller percentages for Black or African American, other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (90.49%)
Two or more races (4.16%)
Black or African American (2.7%)
Other race (1.76%)
Asian (0.55%)
Native American (0.33%)
Native Hawaiian or Pacific Islander (0.02%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 49,641 | 90.49% |
| Two or more races | 2,280 | 4.16% |
| Black or African American | 1,479 | 2.7% |
| Other race | 964 | 1.76% |
| Asian | 303 | 0.55% |
| Native American | 182 | 0.33% |
| Native Hawaiian or Pacific Islander | 12 | 0.02% |
Married
Widowed
Divorced
Separated
Never Married
Seneca County's average per capita income is $43,549. Household income levels show a median of $65,020. The poverty rate stands at 11.91%.
Name | Median | Mean |
|---|---|---|
| Married Families | $94,198 | $108,189 |
| Families | $78,879 | $93,840 |
| Households | $65,020 | $79,613 |
| Non Families | $36,477 | $49,341 |
Average Income
Median Household Income
Poverty Rate
