Decatur County, Iowa Population 2024

7,729

Decatur County, Iowa's estimated 2024 population is 7,729 with a growth rate of 0.3% in the past year according to the most recent United States census data. Decatur County, Iowa is the 86th largest county in Iowa. The 2010 population was 8,419 and has seen a growth of -8.2% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
20297,844230.29%
20287,821230.29%
20277,798230.3%
20267,775230.3%
20257,752230.3%
20247,729230.3%
20237,706230.3%
20227,683230.3%
20217,660550.72%
20207,605-247-3.15%
20197,852-49-0.62%
20187,901-55-0.69%
20177,956-105-1.3%
20168,061-84-1.03%
20158,145-71-0.86%
20148,216-7-0.09%
20138,223-18-0.22%
20128,241-9-0.11%
20118,250-169-2.01%
20108,419
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%
190018,1152,47215.8%
189015,6433072%
188015,3363,31827.61%
187012,0183,34138.5%
18608,6777,712799.17%
1850965-6,879-87.7%
showing: 35 rows
2024 Growth Rate
0.3% (23)
County Website
Decatur County
State
Iowa
County Seat
2010 Population
8,419
Area
532 mi²
Density
15 people/mi²
Growth Since 2010
-8.2% (-690)
Founded
1846

Decatur County, Iowa Population 2024

Population by Race

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Race
Population
Percentage (of total)
White7,17693.39%
Two or more races2733.55%
Black or African American971.26%
Other race610.79%
Asian470.61%
Native American200.26%
Native Hawaiian or Pacific Islander100.13%
showing: 7 rows

White

Two or more races

Black or African American

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

Decatur County, Iowa Population by Race

Decatur County, Iowa Population Pyramid 2024

Decatur County, Iowa Median Age

36.6

Total

34.4

Male

38.6

Female

Decatur County, Iowa Adults

There are 5,999 adults, (1,594 of whom are seniors) in Decatur County, Iowa.

Decatur County, Iowa Age Dependency

74.4

Age Dependency Ratio

36.2

Old Age Dependency Ratio

38.3

Child Dependency Ratio

Decatur County, Iowa Sex Ratio

Female3,77249.09%
Male3,91250.91%

Decatur County, Iowa Population by Age

Decatur County, Iowa Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All3,0582.367.232.8
Married1,6672.9586.413.6
Non Family1,0571.2440.359.7
Female2402.4657.542.5
Male942.3454.345.7
showing: 5 rows

2.79

Average Family Size

2.3

Average Household Size

67.2%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Decatur County, Iowa Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Decatur County, Iowa Educational Attainment by Sex (over 25)

Decatur County, Iowa Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among native american people with a rate of 100%.

The highest rate of bachelors degrees is among black people with a rate of 93.55%.

Decatur County, Iowa Educational Attainment by Race

All

Male

Female

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$40,187

Average Earnings

$45,425

Average Male

$33,609

Average Female

Decatur County, Iowa Earnings by Educational Attainment

Decatur County, Iowa Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Decatur County, Iowa Language

94.22% of Decatur County, Iowa residents speak only English, while 5.78% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 3.62% of the population.

Decatur County, Iowa Language

Decatur County, Iowa Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White6,47589913.88%
Multiple2466225.2%
Native201890%
Other611626.23%
Hispanic184137.07%
Asian38513.16%
Black3339.09%
showing: 7 rows

14.49%

Overall Poverty Rate

13.7%

Male Poverty Rate

15.29%

Female Poverty Rate

Poverty in Decatur County, Iowa

The race most likely to be in poverty in Decatur County, Iowa is Native, with 90% below the poverty level.

The race least likely to be in poverty in Decatur County, Iowa is Hispanic, with 7.07% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.31%. Among those working part-time, it was 21.33%, and for those that did not work, the poverty rate was 20.35%.

Decatur County, Iowa Poverty

rate

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Rate
Poverty
Less Than 9th Grade23.25%
High School16.82%
Some College10.89%
Bachelors or Greater4.47%
showing: 4 rows

Decatur County, Iowa Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed14.29%
Female Employed11.35%
Male Employed7.81%
Male Unemployed6.9%
showing: 4 rows

Decatur County, Iowa Poverty Rate by Employment Status and Sex

Decatur County, Iowa Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Decatur County, Iowa Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

55.2%

Overall Marriage Rate

56.5%

Male Marriage Rate

53.9%

Female Marriage Rate

Decatur County, Iowa Married by Age and Sex

male

female

Decatur County, Iowa Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.

Decatur County, Iowa Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Decatur County, Iowa Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

345

Number of Veterans

332

Male Veterans

13

Female Veterans

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Decatur County, Iowa Veterans by War

count

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Decatur County, Iowa Veterans by Age

count

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Decatur County, Iowa Veterans by Race

Decatur County, Iowa Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

12.05%

Veteran Poverty Rate

40.06%

Veteran Disability Rate

Decatur County, Iowa Veterans by Education

LaborForceParticipation

59.1%

Labor Force Participation

56.6%

Employment Rate

4.2%

Unemployment Rate

Decatur County, Iowa Employment by Age

LaborForceParticipation

Decatur County, Iowa Employment by Race

LaborForceParticipation

Decatur County, Iowa Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

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

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

67.52%

Born in Decatur County, Iowa

97.77%

Native Born

2.23%

Foreign Born

1.83%

Non Citizen

0.39%

Naturalized

Place of Birth

97.77% of Decatur County, Iowa residents were born in the United States, with 67.52% having been born in Iowa. 1.83% 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

Sources