Clinton County, Iowa Demographics 2026

Population Overview

Clinton County is located in Iowa with a total population of 46,383. It is the 12th most populous county out of 99 in Iowa. The county encompasses 1 Census-designated place.

Age Demographics

The median age in Clinton County is 42.5 years. This is 10% higher than the state median of 38.6 years.

Economy, Income & Housing

The median household income in Clinton County is $65,177. This is 11% lower than the state median of $73,147. Compared to the national median of $78,538, household income here is 17% lower. The poverty rate stands at 13.1%. This is 20% higher than the state poverty rate of 11.0%. The unemployment rate is 3.8%. This is 5% higher than the state rate of 3.6%. The median home value is $153,800. Housing costs are 21% lower than the state median of $195,900. With a home-value-to-income ratio of just 2.4x, Clinton County is one of the most affordable housing markets in the area. 73.1% of occupied housing units are owner-occupied. This homeownership rate is 2% higher than the state average of 71.5%.

Race & Ethnicity

Clinton County has a predominantly White (non-Hispanic) population, comprising 89.5% of all residents. Hispanic or Latino residents account for 3.5%. The Asian population (0.8%) is well below the state average of 2.4%.

Education

22.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 28% lower than the state rate of 30.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.7%.