Delaware County's estimated 2025 population is 17,586 with a growth rate of -0.04% in the past year according to the most recent United States census data. Delaware County is the 40th largest county in Iowa. The 2010 population was 17,763 and has seen a growth of -1% since that time.
Data after 2023 is projected based on recent change
The racial composition of Delaware County includes 95.56% White, and smaller percentages for other race, Native American, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Other race
Native American
Asian
Black or African American
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 16,770 | 95.56% |
| Two or more races | 611 | 3.48% |
| Other race | 133 | 0.76% |
| Native American | 19 | 0.11% |
| Asian | 14 | 0.08% |
| Black or African American | 2 | 0.01% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Delaware County's average per capita income is $47,695. Household income levels show a median of $76,205. The poverty rate stands at 7.87%.
Name | Median | Mean |
|---|---|---|
| Married Families | $99,241 | - |
| Families | $89,671 | $115,694 |
| Households | $76,205 | $95,969 |
| Non Families | $42,479 | $54,990 |
Average Income
Median Household Income
Poverty Rate