Decatur, Indiana Demographics & Population 2026
During the 2020–2024 ACS period, Decatur, Indiana had a total population of 9,811, the 89th largest city in Indiana, with a median household income of $58,646, which is 18% lower than the state average. The poverty rate is 11.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Housing is very affordable with a home-value-to-income ratio of just 2.4x.
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 | 9,769 | 9,811 | +0.4% |
| Median household income | $58,867 | $58,646 | -0.4% |
| Median home value | $132,900 | $142,800 | +7.4% |
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: 41 | National average: 61
Education
Educational Attainment (Adults 25+)
Decatur Rankings in Indiana
Explore Indiana Rankings
Other Cities in Adams County
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 |
|---|---|---|---|---|---|
| Greencastle | 9,864 | $55,565 | $169,200 | 22.5% | 12.2% |
| Kendallville | 10,556 | $58,939 | $133,200 | 13.0% | 12.4% |
| Bluffton | 10,529 | $57,539 | $149,600 | 17.7% | 9.5% |
| Columbia City | 9,897 | $68,089 | $189,100 | 23.7% | 13.6% |
| Plymouth | 10,664 | $58,623 | $131,800 | 23.7% | 13.5% |
Population Overview
Decatur is a small city located in Indiana, within Adams County. The total population is 9,811. It ranks as the 89th most populous out of 967 Census-designated places in Indiana.
Age Demographics
The median age in Decatur is 44.6 years. This is 17% higher than the state median of 38.1 years.
Economy, Income & Housing
The median household income in Decatur is $58,646. This is 18% lower than the state median of $71,957. It is also 27% lower than the national median of $80,734. The poverty rate stands at 11.3%. This is 9% lower than the state poverty rate of 12.3%. The unemployment rate is 2.7%. This is 38% lower than the state rate of 4.3%. The median home value is $142,800. Housing costs are 35% lower than the state median of $218,200. With a home-value-to-income ratio of just 2.4x, Decatur is one of the most affordable housing markets in the area. 76.6% of occupied housing units are owner-occupied. This homeownership rate is 9% higher than the state average of 70.5%.
Race & Ethnicity
Decatur has a predominantly White (non-Hispanic) population, comprising 87.3% of all residents. Hispanic or Latino residents account for 9.7%. The Black or African American population (0.7%) is well below the state average of 9.1%. The Asian population (0.0%) is well below the state average of 2.6%.
Education
12.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 58% lower than the state rate of 29.5%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.9%.
Data Sources & Methodology
All demographic data for Decatur, Indiana 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 Indiana state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 967 Census-designated places in Indiana. 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, Indiana?
Decatur, Indiana has a population of 9,811 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Decatur, IN?
The median household income in Decatur is $58,646, which is 27% lower than the national median of $80,734.
What is the poverty rate in Decatur, IN?
The poverty rate in Decatur is 11.3%. This means approximately 1,071 residents live below the federal poverty line.
What is the racial makeup of Decatur, Indiana?
Decatur's population is 87.3% White, 0.7% Black, 9.7% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Decatur, IN?
The median home value in Decatur is $142,800. The home-value-to-income ratio is 2.4x.
How educated is Decatur, Indiana?
12.3% of adults (25+) in Decatur hold a bachelor's degree or higher, and 3.4% hold a graduate or professional degree.