Delaware County's estimated 2026 population is 17,661 with a growth rate of 0.15% 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 -0.57% 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 and multiracial populations.
White (95.56%)
Two or more races (3.48%)
Other race (0.76%)
Native American (0.11%)
Asian (0.08%)
Black or African American (0.01%)
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% |
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