Decatur County, Iowa Population 2021

Decatur County, Iowa's estimated population is 7,830 with a growth rate of -0.25% in the past year according to the most recent United States census data. Decatur County, Iowa is the 87th largest county inIowa. The 2010 Population was 8,418 and has seen a growth of -6.99% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
20217,830-20-0.25%
20207,850-20-0.25%
20197,870-20-0.25%
20187,890-57-0.72%
20177,947-106-1.32%
20168,053-84-1.03%
20158,137-72-0.88%
20148,209-7-0.09%
20138,216-23-0.28%
20128,239-10-0.12%
20118,249-169-2.01%
20108,418800.96%
19908,338-1,456-14.87%
19809,794570.59%
19709,737-802-7.61%
196010,539-2,062-16.36%
195012,601-1,411-10.07%
194014,012-891-5.98%
193014,903-1,663-10.04%
192016,5662191.34%
191016,347-1,768-9.76%
190018,1152,47215.80%
189015,6433072.00%
188015,3363,31827.61%
187012,0183,34138.50%
18608,6777,712799.17%
18509650.00%
2021 Growth Rate
-0.25% (-20)
County Website
State
Founded
1846
County Seat
2010 Population
8,418
Growth Since 2010
-6.99% (-588)
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Decatur County, Iowa Population Growth

Population by Race

Race Population Percentage
White7,55294.65%
Two or More Races1411.77%
Black or African American1411.77%
Asian590.74%
Some Other Race370.46%
Native Hawaiian and Other Pacific Islander250.31%
American Indian and Alaska Native240.30%
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Decatur County, Iowa Population by Race

Decatur County, Iowa Population Pyramid $2021

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Decatur County, Iowa Median Age

36.4


Total

34.5


Male

37.9


Female

Decatur County, Iowa Adults

There are 6,244 adults, (1,567 of whom are seniors) in Decatur County, Iowa.

Decatur County, Iowa Age Dependency

70.6

Age Dependency Ratio

33.5

Old Age Dependency Ratio

37.1

Child Dependency Ratio

Decatur County, Iowa Sex Ratio

Female

3,970

49.76%

Male

4,009

50.24%

Decatur County, Iowa Population by Age

Decatur County, Iowa Renter vs Owner Occupied by Household Type

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Decatur County, Iowa Household Types

Type Owner Renter
Male41.2%58.8%
Non Family47.7%52.3%
Female51.3%48.7%
All67%33%
Married84.5%15.5%

67.0%

Rate of Home Ownership

Decatur County, Iowa Households and Families

Type Count Average Size Owned
All3,2002.2567
Married1,6712.9484.5
Non Family1,1811.1547.7
Female2632.9151.3
Male852.1641.2

2.84

Average Family Size

2.25

Average Household Size

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Decatur County, Iowa Households by Type

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Education Attained Count Percentage
Less Than 9th Grade1833.78%
9th to 12th Grade3467.15%
High School Graduate1,81337.46%
Some College92919.19%
Associates Degree3577.38%
Bachelors Degree69714.40%
Graduate Degree51510.64%
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Decatur County, Iowa Educational Attainment by Sex (over 25)

Decatur County, Iowa Educational Attainment by Race

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Race Total High School Bachelors
White4,6104,1351,143
Hispanic735710
2+ Races585629
Asian49436
Black302424
Native American24
Other Race1010
Islander996

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among black people with a rate of 80.00%.

Decatur County, Iowa Educational Attainment by Race

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Name Average Male Female
Overall$34,274$40,406$26,904
Less Than 9th Grade$19,856$24,632$17,647
High School Graduate$27,209$36,108$19,792
Some College$32,862$42,439$28,317
Bachelors Degree$41,250$50,625$38,036
Graduate Degree$51,161$51,964$48,125

$34,274

Average Earnings

$40,406

Average Male

$26,904

Average Female

Decatur County, Iowa Earnings by Educational Attainment

Decatur County, Iowa Language by Age

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Decatur County, Iowa Language

94.07% of Decatur County, Iowa residents speak only English, while 5.93% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 4.05% of the population.

Decatur County, Iowa Language

Decatur County, Iowa Poverty by Race

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Name Total In Poverty Poverty Rate
White6,8151,22017.90%
Hispanic1724325.00%
Multiple1323123.48%
Native2424100.00%
Asian431637.21%
Black581118.97%
Islander25312.00%
Other2428.33%

18.42%

Overall Poverty Rate

18.93%

Male Poverty Rate

17.91%

Female Poverty Rate

Poverty in Decatur County, Iowa

The race most likely to be in poverty in Decatur County, Iowa is Native, with 100.00% below the poverty level.

The race least likely to be in poverty in Decatur County, Iowa is Other, with 8.33% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 4.90%. Among those working part-time, it was 30.49%, and for those that did not work, the poverty rate was 22.34%.

Decatur County, Iowa Poverty

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Name Poverty
Less Than 9th Grade33.67%
High School14.15%
Some College10.23%
Bachelors or Greater4.46%

Decatur County, Iowa Poverty Rate by Education

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Rate Poverty
Male Unemployed26.47%
Female Unemployed19.05%
Male Employed13.88%
Female Employed13.07%

Decatur County, Iowa Poverty Rate by Employment Status and Sex

Decatur County, Iowa Income by Household Type

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Name Median Mean
Households$44,462$56,959
Families$56,213$66,345
Married Families$62,711-
Non Families$23,425$38,465
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Income by Household Type

Decatur County, Iowa Marital Status

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Marriage Rates

53.0%

Overall Marriage Rate

53.3%

Male Marriage Rate

52.6%

Female Marriage Rate

Decatur County, Iowa Married by Age and Sex

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Decatur County, Iowa Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 55-64.

Decatur County, Iowa Marital Status by Race

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Decatur County, Iowa Marital Status

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421

Number of Veterans

397

Male Veterans

24

Female Veterans

War Veterans
Vietnam215
Korea46
World War II39
First Gulf War35
Second Gulf War29

Decatur County, Iowa Veterans by War

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Age Group Veterans
65 to 74164
75+131
55 to 6463
35 to 5454
18 to 349

Decatur County, Iowa Veterans by Age

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Name Veterans % of Total
White4006.77%
2+ Races1722.08%
Hispanic42.29%
Asian46.78%

Decatur County, Iowa Veterans by Race

Decatur County, Iowa Veterans by Education

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10.12%

Veteran Poverty Rate

39.52%

Veteran Disability Rate

Decatur County, Iowa Veterans by Education

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60.2%

Labor Force Participation

57.3%

Employment Rate

4.8%

Unemployment Rate

Decatur County, Iowa Employment by Age

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Decatur County, Iowa Employment by Race

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Decatur County, Iowa Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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65.11%

Born in Decatur County, Iowa

97.62%

Native Born

2.38%

Foreign Born

1.69%

Non Citizen

0.69%

Naturalized

Place of Birth

97.62% of Decatur County, Iowa residents were born in the United States, with 65.11% having been born in Iowa. 1.69% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Decatur County, Iowa Place of Birth

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources