Johnson County, Kansas Population 2024

627,889

Johnson County, Kansas's estimated 2024 population is 627,889 with a growth rate of 0.7% in the past year according to the most recent United States census data. Johnson County, Kansas is the largest county in Kansas. The 2010 population was 545,681 and has seen a growth of 15.07% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
2029649,6244,3470.67%
2028645,2774,3470.68%
2027640,9304,3470.68%
2026636,5834,3470.69%
2025632,2364,3470.69%
2024627,8894,3470.7%
2023623,5424,3470.7%
2022619,1954,3470.71%
2021614,8483,7470.61%
2020611,1018,1531.35%
2019602,9483,9030.65%
2018599,0456,9901.18%
2017592,0555,4540.93%
2016586,6016,4431.11%
2015580,1586,8361.19%
2014573,3226,6611.18%
2013566,6617,0141.25%
2012559,6476,6131.2%
2011553,0347,3531.35%
2010545,681
1990355,05484,78531.37%
1980270,26952,60724.17%
1970217,66273,87051.37%
1960143,79281,009129.03%
195062,78329,45688.38%
194033,3276,14822.62%
193027,1798,86548.41%
192018,314260.14%
191018,2881841.02%
190018,1047194.14%
189017,3855323.16%
188016,8533,16923.16%
187013,6849,320213.57%
18604,364-645,260-99.33%
showing: 34 rows
2024 Growth Rate
0.7% (4,347)
County Website
Johnson County
State
Kansas
County Seat
2010 Population
545,681
Area
473 mi²
Density
1327 people/mi²
Growth Since 2010
15.07% (82,208)
Founded
August 25, 1855

Johnson County, Kansas Population 2024

Population by Race

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Race
Population
Percentage (of total)
White500,74681.99%
Two or more races34,6125.67%
Asian32,8035.37%
Black or African American29,5914.85%
Other race11,5171.89%
Native American1,2880.21%
Native Hawaiian or Pacific Islander1850.03%
showing: 7 rows

White

Two or more races

Asian

Black or African American

Other race

Native American

Native Hawaiian or Pacific Islander

Johnson County, Kansas Population by Race

Johnson County, Kansas Population Pyramid 2024

Johnson County, Kansas Median Age

38.1

Total

37.2

Male

38.9

Female

Johnson County, Kansas Adults

There are 465,532 adults, (92,867 of whom are seniors) in Johnson County, Kansas.

Johnson County, Kansas Age Dependency

63.9

Age Dependency Ratio

24.9

Old Age Dependency Ratio

39

Child Dependency Ratio

Johnson County, Kansas Sex Ratio

Female308,36050.49%
Male302,38249.51%

Johnson County, Kansas Population by Age

Johnson County, Kansas Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All241,1912.5168.931.1
Married134,1073.1586.313.7
Non Family79,4201.2545.154.9
Female18,8993.045050
Male8,7653.025842
showing: 5 rows

3.06

Average Family Size

2.51

Average Household Size

68.9%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

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

Johnson County, Kansas 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 100%.

The highest rate of bachelors degrees is among asian people with a rate of 70.31%.

Johnson County, Kansas Educational Attainment by Race

All

Male

Female

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$62,789

Average Earnings

$75,489

Average Male

$51,754

Average Female

Johnson County, Kansas Earnings by Educational Attainment

Johnson County, Kansas Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Johnson County, Kansas Language

88.17% of Johnson County, Kansas residents speak only English, while 11.83% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 4.84% of the population.

Johnson County, Kansas Language

Johnson County, Kansas Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White472,89119,2154.06%
Hispanic49,1835,87911.95%
Black28,8243,87413.44%
Multiple34,2642,5167.34%
Asian32,6371,7725.43%
Other11,4171,44812.68%
Native1,21118915.61%
Islander18421.09%
showing: 8 rows

5.27%

Overall Poverty Rate

4.25%

Male Poverty Rate

6.27%

Female Poverty Rate

Poverty in Johnson County, Kansas

The race most likely to be in poverty in Johnson County, Kansas is Native, with 15.61% below the poverty level.

The race least likely to be in poverty in Johnson County, Kansas is Islander, with 1.09% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.29%. Among those working part-time, it was 8.19%, and for those that did not work, the poverty rate was 11.05%.

Johnson County, Kansas Poverty

rate

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Rate
Poverty
Less Than 9th Grade15.58%
High School7.15%
Some College5.45%
Bachelors or Greater2.6%
showing: 4 rows

Johnson County, Kansas Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed21.18%
Male Unemployed9.96%
Female Employed3.81%
Male Employed2.32%
showing: 4 rows

Johnson County, Kansas Poverty Rate by Employment Status and Sex

Johnson County, Kansas Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Johnson County, Kansas Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

56.8%

Overall Marriage Rate

58.7%

Male Marriage Rate

55.0%

Female Marriage Rate

Johnson County, Kansas Married by Age and Sex

male

female

Johnson County, Kansas 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, Kansas Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Johnson County, Kansas Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

26,649

Number of Veterans

25,150

Male Veterans

1,499

Female Veterans

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Johnson County, Kansas Veterans by War

count

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Johnson County, Kansas Veterans by Age

count

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Johnson County, Kansas Veterans by Race

Johnson County, Kansas Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

4.12%

Veteran Poverty Rate

25.83%

Veteran Disability Rate

Johnson County, Kansas Veterans by Education

LaborForceParticipation

71.9%

Labor Force Participation

69.4%

Employment Rate

3.2%

Unemployment Rate

Johnson County, Kansas Employment by Age

LaborForceParticipation

Johnson County, Kansas Employment by Race

LaborForceParticipation

Johnson County, Kansas 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

42.61%

Born in Johnson County, Kansas

91.2%

Native Born

8.8%

Foreign Born

4.23%

Non Citizen

4.56%

Naturalized

Place of Birth

91.2% of Johnson County, Kansas residents were born in the United States, with 42.61% having been born in Kansas. 4.23% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Johnson County, Kansas Place of Birth

Sources