Johnson County, Iowa Population 2023

159,445

Johnson County, Iowa's estimated 2023 population is 159,445 with a growth rate of 1.4% in the past year according to the most recent United States census data. Johnson County, Iowa is the 4th largest county in Iowa. The 2010 population was 130,882 and has seen a growth of 21.82% since that time.

Note: data after 2021 is projected based on recent change
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Johnson County, Iowa Population 2023

Population by Race

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White

Black or African American

Asian

Two or more races

Other race

Native American

Native Hawaiian or Pacific Islander

Johnson County, Iowa Population by Race

Johnson County, Iowa Population Pyramid 2023

Johnson County, Iowa Median Age

30.4

Total

30.1

Male

30.8

Female

Johnson County, Iowa Adults

There are 120,765 adults, (17,513 of whom are seniors) in Johnson County, Iowa.

Johnson County, Iowa Age Dependency

46.1

Age Dependency Ratio

17

Old Age Dependency Ratio

29.1

Child Dependency Ratio

Johnson County, Iowa Sex Ratio

Female76,01350.4%
Male74,80649.6%

Johnson County, Iowa Population by Age

Johnson County, Iowa Renter vs Owner Occupied by Household Type

2.97

Average Family Size

2.37

Average Household Size

58.6%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Johnson 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

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

Johnson 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 islander people with a rate of 87.72%.

The highest rate of bachelors degrees is among asian people with a rate of 49.87%.

Johnson County, Iowa Educational Attainment by Race

All

Male

Female

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$46,081

Average Earnings

$51,473

Average Male

$40,196

Average Female

Johnson County, Iowa Earnings by Educational Attainment

Johnson County, Iowa Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Johnson County, Iowa Language

84.6% of Johnson County, Iowa residents speak only English, while 15.4% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 5.46% of the population.

Johnson County, Iowa Language

Johnson County, Iowa Poverty by Race

rate

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19.64%

Overall Poverty Rate

16.91%

Male Poverty Rate

17.49%

Female Poverty Rate

Poverty in Johnson County, Iowa

The race most likely to be in poverty in Johnson County, Iowa is Islander, with 87.72% below the poverty level.

The race least likely to be in poverty in Johnson County, Iowa is White, with 16.77% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.82%. Among those working part-time, it was 35.05%, and for those that did not work, the poverty rate was 27.02%.

Johnson County, Iowa Poverty

rate

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Johnson County, Iowa Poverty Rate by Education

rate

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Johnson County, Iowa Poverty Rate by Employment Status and Sex

Johnson County, Iowa Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Johnson County, Iowa Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

45.1%

Overall Marriage Rate

45.8%

Male Marriage Rate

44.5%

Female Marriage Rate

Johnson County, Iowa Married by Age and Sex

male

female

Johnson County, Iowa Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

Johnson County, Iowa Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Johnson County, Iowa Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

5,006

Number of Veterans

4,586

Male Veterans

420

Female Veterans

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Johnson County, Iowa Veterans by War

count

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Johnson County, Iowa Veterans by Age

count

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Johnson County, Iowa Veterans by Race

Johnson County, Iowa Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

8.9%

Veteran Poverty Rate

18.35%

Veteran Disability Rate

Johnson County, Iowa Veterans by Education

LaborForceParticipation

70.1%

Labor Force Participation

67.4%

Employment Rate

3.7%

Unemployment Rate

Johnson County, Iowa Employment by Age

LaborForceParticipation

Johnson County, Iowa Employment by Race

LaborForceParticipation

Johnson 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

55.25%

Born in Johnson County, Iowa

87.26%

Native Born

11.41%

Foreign Born

7.87%

Non Citizen

3.54%

Naturalized

Place of Birth

87.26% of Johnson County, Iowa residents were born in the United States, with 55.25% having been born in Iowa. 7.87% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Johnson County, Iowa Place of Birth

Sources