Delaware County's 2026 population is estimated at 248,434, reflecting a 2.15% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Delaware County is the 11th largest county in Ohio. The 2010 population was 175,114 and has grown 41.87% since 2010.
Data after 2023 is projected based on recent change
Overall: 40.1 years
Female: 40.5 years
Male: 39.9 years
There are 170,570 adults, (34,165 of whom are seniors) in Delaware County.
Female: 113,337 (50%)
Male: 113,497 (50%)
The racial composition of Delaware County includes 79.93% White, 8.59% Asian, 4.38% Black or African American, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 181,317 | 79.93% |
| Asian | 19,485 | 8.59% |
| Two or more races | 13,918 | 6.14% |
| Black or African American | 9,931 | 4.38% |
| Other race | 2,016 | 0.89% |
| Native American | 139 | 0.06% |
| Native Hawaiian or Pacific Islander | 28 | 0.01% |
Delaware County 's average per capita income is $79,759. Household income levels show a median of $133,540. The poverty rate stands at 4.67%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $168,466 | $203,731 |
| Families | $157,087 | $188,624 |
| Households | $133,540 | $166,030 |
| Non Families | $62,076 | $88,171 |
Average Income
Median Household Income
Poverty Rate
