Poweshiek County, Iowa Demographics 2026
Poweshiek County, Iowa has a population of 18,545, the 37th most populous county in Iowa. The median household income is $67,391 and the median home value is $209,300. The poverty rate is 10.8%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Poweshiek County Quick Facts
How Poweshiek 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 | 18,582 | 18,545 | -0.2% |
| Median household income | $64,837 | $67,391 | +3.9% |
| Median home value | $184,200 | $209,300 | +13.6% |
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 Poweshiek County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Grinnell | 9,505 | $65,320 | 11.1% | $209,500 |
| Brooklyn | 1,459 | $73,438 | 21.6% | $137,100 |
| Montezuma | 1,410 | $65,660 | 12.5% | $179,400 |
| Victor | 987 | $74,000 | 22.3% | $116,600 |
| Holiday Lake | 397 | $82,868 | 4.0% | $284,800 |
| Deep River | 335 | $83,125 | 3.6% | $95,200 |
| Malcom | 221 | $76,750 | 10.1% | $109,800 |
| Hartwick | 114 | $83,750 | 1.8% | $90,000 |
| Searsboro | 109 | $66,250 | 17.4% | $104,200 |
| Guernsey | 50 | $70,833 | 2.0% | $73,300 |
Explore Iowa Rankings
Population Overview
Poweshiek County is located in Iowa with a total population of 18,545. It is the 37th most populous county out of 99 in Iowa. The county encompasses 10 Census-designated places.
Age Demographics
The median age in Poweshiek County is 41.0 years. This is 6% higher than the state median of 38.6 years.
Economy, Income & Housing
The median household income in Poweshiek County is $67,391. This is 10% lower than the state median of $75,059. It is also 17% lower than the national median of $80,734. The poverty rate stands at 10.8%. This is 3% lower than the state poverty rate of 11.1%. The unemployment rate is 3.6%. This is 2% higher than the state rate of 3.6%. The median home value is $209,300. Housing costs are about the same as the state median of $208,000. The home-value-to-income ratio is 3.1x. 71.2% of occupied housing units are owner-occupied.
Race & Ethnicity
Poweshiek County has a predominantly White (non-Hispanic) population, comprising 89.8% of all residents. Hispanic or Latino residents account for 3.5%. The Black or African American population (0.9%) is well below the state average of 3.8%. The Hispanic or Latino population (3.5%) is well below the state average of 7.3%.
Education
27.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 13% 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 94.9%.
Data Sources & Methodology
All figures for Poweshiek 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 Poweshiek County, Iowa?
Poweshiek County has a population of 18,545, making it the 37th most populous county in Iowa.
What is the median income in Poweshiek County?
The median household income in Poweshiek County is $67,391 with a poverty rate of 10.8%.
How many cities are in Poweshiek County, Iowa?
Poweshiek County contains 10 Census-designated places.