Decatur, Iowa Demographics & Population 2026
During the 2020–2024 ACS period, Decatur, Iowa had a total population of 190, the 707th largest city in Iowa, with a median household income of $45,781, which is 39% lower than the state average. The poverty rate is 28.4%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 39% below the state average, indicating significant economic challenges.
- More than 1 in 4 residents live below the poverty line (28.4%), well above the national average of 12.4%.
- Only 9.7% of adults have a bachelor's degree, well below the national average of 35.7%.
- Housing is very affordable with a home-value-to-income ratio of just 2.2x.
- Near full employment with an unemployment rate of just 0.9%.
Decatur Quick Facts
How Decatur 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 | 163 | 190 | +16.6% |
| Median household income | $33,750 | $45,781 | +35.6% |
| Median home value | $84,200 | $101,000 | +20.0% |
How Decatur Compares
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+)
Decatur Rankings in Iowa
Explore Iowa Rankings
Cities Similar to Decatur
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Bentley | 189 | N/A | $188,900 | 63.7% | 6.3% |
| Williamson | 190 | $45,000 | N/A | 0.0% | 35.8% |
| Weston | 192 | N/A | N/A | 65.5% | 0.0% |
| Moorhead | 195 | $45,000 | $54,200 | 8.2% | 26.2% |
| Alta Vista | 194 | $44,500 | $68,200 | 4.4% | 12.9% |
A note before these figures: with a population of 190, Decatur's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Decatur is a small community located in Iowa. The total population is 190. It ranks as the 707th most populous out of 1,017 Census-designated places in Iowa.
Age Demographics
The median age in Decatur is 33.5 years. This is 13% lower than the state median of 38.6 years.
Economy, Income & Housing
The median household income in Decatur is $45,781. This is 39% lower than the state median of $75,059. It is also 43% lower than the national median of $80,734. The poverty rate stands at 28.4%. This is 156% higher than the state poverty rate of 11.1%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 0.9%. This is 75% lower than the state rate of 3.6%. The median home value is $101,000. Housing costs are 51% lower than the state median of $208,000. With a home-value-to-income ratio of just 2.2x, Decatur is one of the most affordable housing markets in the area. 98.7% of occupied housing units are owner-occupied. This homeownership rate is 38% higher than the state average of 71.7%.
Race & Ethnicity
Decatur has a predominantly White (non-Hispanic) population, comprising 88.4% of all residents. Hispanic or Latino residents account for 5.3%.
Education
9.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 69% 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 87.4%.
Data Sources & Methodology
All demographic data for Decatur, Iowa is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Iowa state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,017 Census-designated places in Iowa. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Decatur, Iowa?
Decatur, Iowa has a population of 190 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Decatur, IA?
The median household income in Decatur is $45,781, which is 43% lower than the national median of $80,734.
What is the poverty rate in Decatur, IA?
The poverty rate in Decatur is 28.4%. This means approximately 54 residents live below the federal poverty line.
What is the racial makeup of Decatur, Iowa?
Decatur's population is 88.4% White, 0.0% Black, 5.3% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Decatur, IA?
The median home value in Decatur is $101,000. The home-value-to-income ratio is 2.2x.
How educated is Decatur, Iowa?
9.7% of adults (25+) in Decatur hold a bachelor's degree or higher, and 0.0% hold a graduate or professional degree.