Delaware County, Iowa
Located in Iowa, Delaware County has a population of 17,558 residents and a median age of 43.4 years, making it the #2,007 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 7.8%. The median home value is $177,900, and the median household income is $74,989, which is 0% below the national median.
Demographics
Delaware County has a population of 17,558, making it the #2,007 most populous county in the US. The median age is 43.4 years, which is 11.6% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Delaware County is $74,989, ranking #841 out of 3,222 counties — 0.2% below the national median. The poverty rate is 7.8% and unemployment stands at 2.0%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Delaware County is $177,900 (-36.9% vs national). Renters pay a median of $764/mo and the homeownership rate is 79.6%.
Median Home Value Trend
Rankings →Household Type
Education
In Delaware County, 22.6% of adults age 25+ hold a bachelor's degree or higher, which is 33.1% below the national average, ranking #1,568 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Delaware County is 79.3 years. 13.6% of adults report poor or fair health and 5.3% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
15.9% of adults in Delaware County smoke , 40.6% are obese , and 25.4% report excessive drinking.
Adult Smoking Trend
Safety
The suicide rate is 22.4 per 100,000. Motor vehicle deaths occur at a rate of 13.3 per 100,000.
Suicide Rate Trend
Families & Children
9.7% of children in Delaware County live in poverty . The teen birth rate is 9.7 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Delaware County is 76.9%. The mean commute time is 22.4 min, which is 18.9% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Delaware County voted Republican with a margin of 39.6%. The vote was 29.5% Dem / 69.1% Rep. Compared to 2020, the margin shifted 4.6 toward Republicans .
Vote Share Over Time
About Delaware County, Iowa
Delaware County, Iowa has a total population of 17,558, making it the 2,007th most populous county in the United States. The median age in Delaware County is 43.4 years, which is 11.6% above the national median of 38.9 years.
The median household income in Delaware County is $74,989, which ranks #841 of 3,222 counties nationwide. This is 0.2% below the national median of $75,149. The poverty rate is 7.8%, lower than the national rate of 12.6%. The unemployment rate stands at 2.0%.
The median home value in Delaware County is $177,900, 36.9% below the national median. Renters in Delaware County pay a median gross rent of $764 per month. The homeownership rate is 79.6%, compared to the national rate of 64.4%.
In Delaware County, 22.6% of residents aged 25 and older hold a bachelor's degree or higher, 33.1% below the national average of 33.7%. Health insurance coverage stands at 96.7% of the population. The average commute time for workers is 22.4 min.
Delaware County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 94.1% of the population, followed by Two or More Races (3.7%) and Hispanic or Latino (1.7%).
All data for Delaware County, Iowa comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.