Dubuque County, Iowa
Located in Iowa, Dubuque County has a population of 99,030 residents and a median age of 39.1 years, making it the #626 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 9.7%. The median home value is $237,300, and the median household income is $77,630, which is 3% above the national median.
Demographics
Dubuque County has a population of 99,030, making it the #626 most populous county in the US. The median age is 39.1 years, which is 0.5% 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 Dubuque County is $77,630, ranking #691 out of 3,222 counties — 3.3% above the national median. The poverty rate is 9.7% and unemployment stands at 3.7%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Dubuque County is $237,300 (-15.8% vs national). Renters pay a median of $959/mo and the homeownership rate is 73.3%.
Median Home Value Trend
Rankings →Household Type
Education
In Dubuque County, 33.4% of adults age 25+ hold a bachelor's degree or higher, which is 1.0% below the national average, ranking #552 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Dubuque County is 78.7 years. 16.7% of adults report poor or fair health and 4.6% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
19.2% of adults in Dubuque County smoke , 41.5% are obese , and 25.4% report excessive drinking. The drug overdose death rate is 14.2 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Dubuque County is 1.6 per 100,000 and the suicide rate is 17.1 per 100,000. Motor vehicle deaths occur at a rate of 7.8 per 100,000.
Homicide Rate Trend
Families & Children
10.2% of children in Dubuque County live in poverty and the infant mortality rate is 3.5 per 1,000 live births. The teen birth rate is 13.0 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Dubuque County is 73.2%. The mean commute time is 18.5 min, which is 32.8% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Dubuque County voted Republican with a margin of 8.6%. The vote was 45.1% Dem / 53.7% Rep. Compared to 2020, the margin shifted 5.7 toward Republicans .
Vote Share Over Time
About Dubuque County, Iowa
Dubuque County, Iowa has a total population of 99,030, making it the 626th most populous county in the United States. The median age in Dubuque County is 39.1 years, which is 0.5% above the national median of 38.9 years.
The median household income in Dubuque County is $77,630, which ranks #691 of 3,222 counties nationwide. This is 3.3% above the national median of $75,149. The poverty rate is 9.7%, lower than the national rate of 12.6%. The unemployment rate stands at 3.7%.
The median home value in Dubuque County is $237,300, 15.8% below the national median. Renters in Dubuque County pay a median gross rent of $959 per month. The homeownership rate is 73.3%, compared to the national rate of 64.4%.
In Dubuque County, 33.4% of residents aged 25 and older hold a bachelor's degree or higher, 1.0% below the national average of 33.7%. Health insurance coverage stands at 96.5% of the population. The average commute time for workers is 18.5 min.
Dubuque County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 88.3% of the population, followed by Hispanic or Latino (3.3%) and Two or More Races (3.3%).
All data for Dubuque 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.