Clinton County, Iowa Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Clinton County, IA Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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B
Health Around averageLess healthy than 81% of counties in Iowa
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C
Income Below averageLess wealthy than 76% of counties in Iowa
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D
Education Well below average
Source: Map AI Methodology
Population: density and quick facts
| Metric | Clinton County | Iowa Avg | U.S. Average |
|---|---|---|---|
| Population | 46,268 | 3,204,793 | 337,468,954 |
| Population density (per sq mi) | 65.1 | 57.0 | 86.4 |
| Population growth (%/yr) | -0.45% | 0.41% | 0.59% |
| Median age | 43.5 | 36.8 | 37.3 |
| Households | 19,506 | 1,308,457 | 130,235,071 |
Population in Clinton County declined by 5.8% from 2009 to 2024, reaching 46,268 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Clinton County is Gen X, aged 45–60, at 21.3% of residents. That is 2.4 points above Iowa as a whole.
- Gen Z 13–28 8,746 18.9% -3.4 pts
- Millennials 29–44 8,653 18.7% -1.8 pts
- Gen X 45–60 9,846 21.3% +2.4 pts
- Boomers 61–79 9,299 20.1% +2.4 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Iowa, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 51.2% of the people living in Clinton County and men 48.8%.
- Women 51.2% Iowa 50.0%
- Men 48.8% Iowa 50.0%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Clinton County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Clinton County has a the economy index of C, which means it is somewhat prosperous.
| Metric | Clinton County | Iowa Avg | U.S. Average |
|---|---|---|---|
| Median household income | $68,145 | $75,133 | $80,455 |
| Income growth (%/yr) | 3.97% | 3.99% | 4.80% |
| Unemployment rate | 3.4% | 3.6% | 5.2% |
The median household income in Clinton County is about 9% lower than in Iowa.
Housing
| Metric | Clinton County | Iowa Avg | U.S. Average |
|---|---|---|---|
| Median home price | $164,024 | $153,425 | $248,835 |
| Median rent | $849 | $971 | $1,407 |
| Homeownership rate | 74.5% | 71.7% | 65.2% |
The median home price in Clinton County is about 16.1 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $849 per month for that long.
Commute Time & Mobility
Commuters in Clinton County spend about 34 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 143 hours, about 6.0 full days, spent commuting.
| Metric | Clinton County | Iowa Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 17.2 | 17.0 | 22.4 |
| Round-trip commute (min) | 34.4 | 33.9 | 44.8 |
| Yearly time spent (hours) | 143 | 141 | 187 |
| Estimated yearly cost | $4,440 | $4,382 | $5,790 |
| Work from home | 6.8% | 11.3% | 15.0% |
| Highway traffic (vehicles/day) | 3,782 | 4,993 | 8,813 |
| Local road traffic (vehicles/day) | 309 | 606 | 1,355 |
Fastest commutes among counties in
Iowa:
Sioux County (10.1 min), Union County (10.4 min), Cass County (10.6 min).
Slowest:
Monroe County (30.4 min), Madison County (30.1 min), Mills County (26.7 min).
The average commute time in Clinton County is about the same as in Iowa.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Clinton County has a education index of D, which means it is barely educated.
| Metric | Clinton County | Iowa Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 19.9% | 27.9% | 31.6% |
| Average household size | 2.34 | 2.37 | 2.53 |
Highest education index among counties in
Iowa:
Johnson County (0.4), Dallas County (0.4), Story County (0.4).
Lowest:
Crawford County (0.2), Wayne County (0.2), Louisa County (0.2).
Health
Clinton County has a health index of B, which means it is quite healthy.
| Metric | Clinton County | Iowa Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 77.9 | 79.2 | 78.3 |
| Self-rated poor health | 15.1% | 13.6% | 16.3% |
| Smokers | 19.7% | 17.6% | 19.0% |
Highest health index among counties in
Iowa:
Johnson County (0.8), Story County (0.8), Winneshiek County (0.8).
Lowest:
Davis County (0.8), Wayne County (0.8), Appanoose County (0.8).
Clinton County, IA Compared With Nearby Counties
Clinton County, IA is the 3rd largest of the 4 counties compared here, 46,268 residents against a local median of 142,693. Nothing separates Clinton County, IA sharply from the counties around it. Each measure below lands within 15% of the local median, close enough that the differences are within what survey sampling alone would produce.
The largest of those small differences is median household income, 8% below the local median at $68,145 against $73,995. Clinton County, IA has the 3rd highest median household income of the 4 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Clinton County, IA | 46,268 | $68,145 #3/4 | $164,024 #4/4 | 17.2 min #1/4 |
| Scott County, IA | 174,608 | $78,775 | $168,067 | 18.0 min |
| Rock Island County, IL | 142,693 | $67,544 | $170,155 | 17.8 min |
| Jo Daviess County, IL | 21,851 | $73,995 | $263,988 | 18.0 min |
Frequently Asked Questions
Common questions about Clinton County, Iowa.
How big is Clinton County, Iowa by population?
About 46,268 people live in Clinton County, Iowa, in 19,506 households of 2.3 people on average. The median age is 43.5, so residents are older than the U.S. median of 37.3 by about 6 years.
How densely populated is Clinton County, Iowa?
Averaged over its land area, Clinton County, Iowa has 65 people per square mile, a density typical of rural areas. That is close to the U.S. average of 86.
How affordable is housing in Clinton County, Iowa?
The median home costs 2.4 times the median household income ($164,024 against $68,145), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $849 a month takes about 15% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is unemployment high in Clinton County, Iowa?
Unemployment in Clinton County, Iowa is only 3.4%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
What share of adults in Clinton County, Iowa have a college degree?
19.9% of adults in Clinton County, Iowa hold a bachelor's degree or higher (about 1 in 5), well below the U.S. share of 31.6%.
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