Hamilton County, Iowa Demographics 2026

Population Overview

Hamilton County is located in Iowa with a total population of 14,893. It is the 51st most populous county out of 99 in Iowa. The county encompasses 2 Census-designated places.

Age Demographics

The median age in Hamilton County is 42.2 years. This is 9% higher than the state median of 38.6 years.

Economy, Income & Housing

The median household income in Hamilton County is $71,750. This is 2% lower than the state median of $73,147. Compared to the national median of $78,538, household income here is 9% lower. The poverty rate stands at 8.0%. This is 27% lower than the state poverty rate of 11.0%. The unemployment rate is 4.0%. This is 9% higher than the state rate of 3.6%. The median home value is $132,300. Housing costs are 32% lower than the state median of $195,900. With a home-value-to-income ratio of just 1.8x, Hamilton County is one of the most affordable housing markets in the area. 73.8% of occupied housing units are owner-occupied. This homeownership rate is 3% higher than the state average of 71.5%.

Race & Ethnicity

The largest racial or ethnic group in Hamilton County is White (non-Hispanic), making up 84.2% of the population. Hispanic or Latino residents account for 9.7%. The Black or African American population (1.2%) is well below the state average of 3.8%.

Education

22.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 29% 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 92.6%.