Decatur, IN Demographics

Population 15,565 · Census ACS 2020–24

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Median age by neighborhoodHistory and comparison ↓︎
Decatur, IN map of median age by neighborhood
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Population and households in Decatur

Household size in Decatur

Household size, people per household
PeriodDecaturIndianaU.S.
2006–102.482.572.68
2010–142.432.592.73
2015–192.422.572.71
2020–242.482.542.65
Change+0.00−0.03−0.03
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The average household in Decatur has 2.48 people, under the U.S. average of 2.65. Indiana as a whole looks much the same.

Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).

Median age in Decatur

Median age, years
PeriodDecaturIndianaU.S.
2006–1038.737.537.7
2010–1442.838.438.6
2015–1940.839.139.6
2020–2443.839.340.1
Change+5.1+1.7+2.3
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The median resident of Decatur is 43.8 years old, older than the national median of 40.1. Since 2006–10, the median age has climbed from 38.7, as it has nationally. Residents skew youngest in the west and oldest in the southeast.

Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).

Single-parent households in Decatur

Single-parent households, % of households
PeriodDecaturIndianaU.S.
2006–1011.1%11.8%12.3%
2010–1411.6%12.0%12.3%
2015–1912.2%11.6%11.6%
2020–249.1%11.7%11.6%
Change−2.0 pts−0.1 pts−0.6 pts
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Single parents head just over one in twelve households in Decatur (9.1%), below the national share of 11.6%. Since 2006–10, the single-parent share has fallen 2.0 points, a much bigger shift than nationally.

Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).

Housing in Decatur

Renters in Decatur

Renters, % of occupied homes
PeriodDecaturIndianaU.S.
2006–1024.6%28.5%33.3%
2010–1424.4%30.5%35.6%
2015–1926.0%30.9%36.0%
2020–2416.7%29.4%34.8%
Change−8.0 pts+1.0 pts+1.5 pts
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Decatur is largely a place of homeowners: only 16.7% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Nearly four in ten owners (38.4%) have paid off their mortgages, about the same as nationally. Since 2006–10, the renter share has fallen 8.0 points, even as the national share rose.

Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).

Vacant homes in Decatur

Vacant homes, % of all homes
PeriodDecaturIndianaU.S.
2006–107.4%11.2%11.4%
2010–148.4%11.2%11.4%
2015–199.0%10.9%11.1%
2020–248.7%9.3%9.6%
Change+1.3 pts−2.0 pts−1.8 pts
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Vacancy in Decatur is close to the national rate: 8.7% of homes are empty, against 9.6%. Since 2006–10, vacancy has edged up 1.3 points, even as the national rate fell.

Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).

Age of homes in Decatur

Age of homes, median year built
PeriodDecaturIndianaU.S.
2006–10196619721974
2010–14196619731975
2015–19196519741977
2020–24196619771980
Change+0+5+6
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The housing in Decatur is old by national standards: the median home dates to 1966, against 1980 for the U.S., so buyers will find more older houses, some of them due for updates. The newest homes are mostly in the northwest, the oldest in the center.

Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).

Rent in Decatur

Rent, per month
PeriodDecaturIndianaU.S.
2006–10$595$763$965
2010–14$551$819$1,040
2015–19$723$903$1,213
2020–24$902$1,146$1,571
Change+$307+$384+$606
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Rent in Decatur runs $902 a month at the median, utilities included, well below the U.S. median of $1,571. Rent has climbed $307 a month since 2006–10, up 52%, a slower climb than the nation's. Rent takes 28.9% of the typical renter's income, just under the 30% mark often used to define affordable rent. The priciest rents are in the southeast; the most affordable are in the southwest.

Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).

Education in Decatur

Bachelor's degrees in Decatur

Bachelor's degrees, % of adults 25+
PeriodDecaturIndianaU.S.
2006–1011.7%23.8%28.4%
2010–1415.3%24.6%29.6%
2015–1915.1%27.1%32.1%
2020–2413.7%30.0%35.6%
Change+1.9 pts+6.2 pts+7.2 pts
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College degrees are relatively uncommon in Decatur: 13.7% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%. The share with a degree is up 1.9 points from 2006–10, a smaller shift than nationally. Only 17 of the 187 Indiana cities with 5,000+ people have a lower share of college graduates.

Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).

High school graduates in Decatur

High school graduates, % of adults 25+
PeriodDecaturIndianaU.S.
2006–1086.7%86.5%84.9%
2010–1487.9%87.7%86.1%
2015–1990.3%88.7%87.7%
2020–2494.6%89.9%89.3%
Change+7.9 pts+3.4 pts+4.3 pts
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High school completion is high in Decatur: 94.6% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The share with a diploma is up 7.9 points from 2006–10, in line with the national trend.

High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).

Jobs in Decatur

Unemployment, % of the labor force
PeriodDecaturIndianaU.S.
2006–109.3%8.4%8.1%
2010–148.0%8.9%9.4%
2015–193.3%4.9%5.6%
2020–242.7%4.3%5.4%
Change−6.5 pts−4.1 pts−2.7 pts
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The job market in Decatur has been strong: just 2.7% of the labor force was out of work and looking, well below the national rate of 5.4%. Since 2006–10, unemployment has fallen 6.5 points, mirroring the country. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.

Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).

Decatur compared with nearby cities

CityHousehold sizeMedian ageSingle parentsRentersVacant homesMedian year builtMedian rentBachelor's degreeHigh school diplomaUnemployment
Decatur2.4843.89.1%16.7%8.7%1966$90213.7%94.6%2.7%
Monmouth2.4048.37.7%10.4%3.2%1976$95820.7%97.4%4.7%
Rivare2.4253.33.8%6.4%10.9%1974$95816.4%94.6%2.0%
Preble3.2337.06.1%12.4%9.3%1969$96130.4%99.8%0.3%
Peterson3.6631.712.5%13.2%3.4%1938$84220.9%97.5%0.0%
Linn Grove3.2530.85.2%9.0%2.6%1976$77819.1%82.0%5.3%
Magley3.2633.511.4%14.8%7.3%1957$91425.1%98.8%0.6%
Monroe4.1022.44.0%10.2%2.7%1973$87513.7%74.4%4.1%
Honduras3.7130.09.5%10.2%3.1%1949$81821.3%94.6%0.0%
Wren2.8338.53.2%7.8%24.7%1942$67719.7%96.3%0.3%
Curryville3.4238.46.3%11.0%5.4%1950$79018.5%94.5%2.1%

All figures 2020–24.

Cities with similar populations: Loris, SC · Richlands, NC · Rhinelander, WI · Red Bank, TN · Raynham, MA · Ramsey, NJ · Marshall, MN · Marinette, WI · Malibu, CA · Madisonville, TN

About these numbers

Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Decatur. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.

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