Delaware County's estimated 2026 population is 17,746 with a growth rate of 0.41% 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 -0.1% since that time.
Data after 2023 is projected based on recent change
Overall: 43.4 years
Female: 44.3 years
Male: 43.1 years
There are 13,474 adults, (3,784 of whom are seniors) in Delaware County.
Female: 8,584 (48.9%)
Male: 8,974 (51.1%)
The racial composition of Delaware County includes 94.18% White, and smaller percentages for Native American, other race, Black or African American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 16,536 | 94.18% |
| Two or more races | 731 | 4.16% |
| Native American | 188 | 1.07% |
| Other race | 90 | 0.51% |
| Black or African American | 13 | 0.07% |
Delaware County's average per capita income is $47,407. Household income levels show a median of $74,989. The poverty rate stands at 7.76%.
Name | Median | Mean |
|---|---|---|
| Married Families | $97,298 | - |
| Families | $89,677 | $116,475 |
| Households | $74,989 | $96,512 |
| Non Families | $46,331 | $58,930 |
Average Income
Median Household Income
Poverty Rate