Marshall County, Iowa Demographics 2026
Marshall County, Iowa has a population of 40,114, the 15th most populous county in Iowa. The median household income is $73,315 and the median home value is $145,500. The poverty rate is 11.2%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Marshall County Quick Facts
How Marshall County Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 39,971 | 40,114 | +0.4% |
| Median household income | $72,785 | $73,315 | +0.7% |
| Median home value | $134,100 | $145,500 | +8.5% |
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 31 | National average: 61
Education
Educational Attainment (Adults 25+)
Cities & Places in Marshall County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Marshalltown | 27,626 | $69,068 | 14.3% | $127,700 |
| State Center | 1,412 | $83,942 | 4.9% | $167,400 |
| Melbourne | 804 | $71,667 | 11.7% | $155,400 |
| Le Grand | 720 | $76,250 | 5.6% | $145,700 |
| Gilman | 623 | $101,136 | 8.8% | $88,700 |
| Albion | 622 | $91,250 | 10.7% | $135,200 |
| Liscomb | 298 | $84,042 | 4.7% | $93,800 |
| Laurel | 278 | $61,250 | 8.3% | $103,100 |
| Rhodes | 265 | $73,083 | 7.5% | $98,000 |
| Haverhill | 142 | $61,607 | 12.8% | $115,300 |
| Clemons | 108 | N/A | 0.9% | $96,400 |
| St. Anthony | 92 | $58,750 | 23.9% | $36,300 |
| Green Mountain | 87 | $36,696 | 13.8% | $75,000 |
| Ferguson | 85 | $52,500 | 11.0% | $75,600 |
Explore Iowa Rankings
Population Overview
Marshall County is located in Iowa with a total population of 40,114. It is the 15th most populous county out of 99 in Iowa. The county encompasses 14 Census-designated places.
Age Demographics
The median age in Marshall County is 38.5 years. This is about the same as the state median of 38.6 years.
Economy, Income & Housing
The median household income in Marshall County is $73,315. This is 2% lower than the state median of $75,059. It is also 9% lower than the national median of $80,734. The poverty rate stands at 11.2%. This is about the same as the state poverty rate of 11.1%. The unemployment rate is 4.3%. This is 20% higher than the state rate of 3.6%. The median home value is $145,500. Housing costs are 30% lower than the state median of $208,000. With a home-value-to-income ratio of just 2.0x, Marshall County is one of the most affordable housing markets in the area. 75.0% of occupied housing units are owner-occupied. This homeownership rate is 5% higher than the state average of 71.7%.
Race & Ethnicity
The largest racial or ethnic group in Marshall County is White (non-Hispanic), making up 66.0% of the population. Hispanic or Latino residents account for 24.6%. The Black or African American population (1.6%) is well below the state average of 3.8%. The Hispanic or Latino population is significantly higher than the state average (24.6% vs 7.3%). The Asian population is significantly higher than the state average (4.1% vs 2.5%).
Education
22.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 28% lower than the state rate of 31.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 86.9%.
Data Sources & Methodology
All figures for Marshall County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Iowa and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.
Frequently Asked Questions
What is the population of Marshall County, Iowa?
Marshall County has a population of 40,114, making it the 15th most populous county in Iowa.
What is the median income in Marshall County?
The median household income in Marshall County is $73,315 with a poverty rate of 11.2%.
How many cities are in Marshall County, Iowa?
Marshall County contains 14 Census-designated places.