Marshall County, Iowa Demographics 2026

Population Overview

Marshall County is located in Iowa with a total population of 39,971. It is the 15th most populous county out of 99 in Iowa.

Age Demographics

The median age in Marshall County is 38.7 years. This is about average than the state median of 38.6 years.

Economy, Income & Housing

The median household income in Marshall County is $72,785. This is about average than the state median of $73,147. Compared to the national median of $78,538, household income here is 7% lower. The poverty rate stands at 11.1%. This is about average than the state poverty rate of 11.0%. The unemployment rate is 4.0%. This is 11% higher than the state rate of 3.6%. The median home value is $134,100. Housing costs are 32% lower than the state median of $195,900. With a home-value-to-income ratio of just 1.8x, Marshall County is one of the most affordable housing markets in the area. 73.3% 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 Marshall County is White (non-Hispanic), making up 67.4% of the population. Hispanic or Latino residents account for 23.8%. The Black or African American population (1.5%) is well below the state average of 3.8%. The Hispanic or Latino population is significantly higher than the state average (23.8% vs 7.0%). The Asian population is significantly higher than the state average (4.3% vs 2.4%).

Education

21.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 30% 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 87.0%.