Grundy County, Iowa Demographics 2026
Grundy County, Iowa has a population of 12,384, the 60th most populous county in Iowa. The median household income is $87,205 and the median home value is $198,800. The poverty rate is 6.5%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Grundy County Quick Facts
How Grundy 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 | 12,352 | 12,384 | +0.3% |
| Median household income | $83,617 | $87,205 | +4.3% |
| Median home value | $180,500 | $198,800 | +10.1% |
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
A less diverse community where one racial or ethnic group represents a large majority.
State average: 31 | National average: 61
Education
Educational Attainment (Adults 25+)
Cities & Places in Grundy County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Grundy Center | 2,809 | $80,357 | 11.1% | $177,900 |
| Reinbeck | 1,715 | $86,797 | 4.4% | $165,000 |
| Dike | 1,365 | $91,146 | 5.4% | $247,800 |
| Conrad | 1,191 | $73,292 | 5.2% | $164,700 |
| Wellsburg | 673 | $64,375 | 4.5% | $118,500 |
| Holland | 327 | $72,788 | 15.4% | $125,000 |
| Stout | 296 | $82,500 | 10.5% | $125,800 |
| Beaman | 125 | $80,000 | 0.8% | $96,700 |
| Morrison | 96 | $66,250 | 17.7% | $95,000 |
Explore Iowa Rankings
Population Overview
Grundy County is located in Iowa with a total population of 12,384. It is the 60th most populous county out of 99 in Iowa. The county encompasses 9 Census-designated places.
Age Demographics
The median age in Grundy County is 41.9 years. This is 9% higher than the state median of 38.6 years.
Economy, Income & Housing
The median household income in Grundy County is $87,205. This is 16% higher than the state median of $75,059. It is also 8% higher than the national median of $80,734. The poverty rate stands at 6.5%. This is 41% lower than the state poverty rate of 11.1%. The unemployment rate is 2.0%. This is 45% lower than the state rate of 3.6%. The median home value is $198,800. Housing costs are 4% lower than the state median of $208,000. With a home-value-to-income ratio of just 2.3x, Grundy County is one of the most affordable housing markets in the area. 84.5% of occupied housing units are owner-occupied. This homeownership rate is 18% higher than the state average of 71.7%.
Race & Ethnicity
Grundy County has a predominantly White (non-Hispanic) population, comprising 94.9% of all residents. Hispanic or Latino residents account for 1.8%. The Black or African American population (0.6%) is well below the state average of 3.8%. The Hispanic or Latino population (1.8%) is well below the state average of 7.3%. The Asian population (0.5%) is well below the state average of 2.5%.
Education
27.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 11% 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 96.9%.
Data Sources & Methodology
All figures for Grundy 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 Grundy County, Iowa?
Grundy County has a population of 12,384, making it the 60th most populous county in Iowa.
What is the median income in Grundy County?
The median household income in Grundy County is $87,205 with a poverty rate of 6.5%.
How many cities are in Grundy County, Iowa?
Grundy County contains 9 Census-designated places.