Johnson County, Kansas Population 2020

Johnson County, Kansas's estimated population is 591,284 with a growth rate of 0.92% in the past year according to the most recent United States census data. Johnson County, Kansas is the largest county in Kansas.

Year Population Growth Growth Rate
2018597,5556,2711.06%
2017591,2845,3630.92%
2016585,9216,2131.07%
2015579,7086,6651.16%
2014573,0436,6321.17%
2013566,4116,9601.24%
2012559,4516,5791.19%
2011552,8727,2071.32%
2010545,665190,61153.69%
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%
18604,3640.00%

How Many People Live in Johnson County, Kansas?

591,284

Population by Race

Race Population Percentage
White505,12886.27%
Asian28,7494.91%
Black or African American27,3604.67%
Two or More Races16,9622.90%
Some Other Race5,5410.95%
American Indian and Alaska Native1,5170.26%
Native Hawaiian and Other Pacific Islander2450.04%

Johnson County, Kansas Population Pyramid 2020

Johnson County, Kansas Median Age

37.5


Total

36.3


Male

38.7


Female

Johnson County, Kansas Adults

There are 439,727 adults, (79,578 of whom are seniors) in Johnson County, Kansas.

Johnson County, Kansas Age Dependency

62.6

Age Dependency Ratio

22.1

Old Age Dependency Ratio

40.5

Child Dependency Ratio

Johnson County, Kansas Sex Ratio

Female

298,515

50.98%

Male

286,987

49.02%

Johnson County, Kansas Households and Families

Johnson County, Kansas Renter vs Owner Occupied by Household Type

Johnson County, Kansas Household Types

Type Owner Renter
Married85.6%14.4%
All69.1%30.9%
Male50%50%
Female49.8%50.2%
Non Family47.3%52.7%

69.1%

Rate of Home Ownership

Type Count Average Size Owned
All226,2422.5769.1
Married127,0393.1985.6
Non Family71,5001.2447.3
Female19,6513.0949.8
Male8,0523.2150

3.12

Average Family Size

2.57

Average Household Size

4.9%

Unmarried (Opposite Sex)

0.3%

Unmarried (Same Sex)

Johnson County, Kansas Education

Education Attained Count Percentage
Less Than 9th Grade6,5571.67%
9th to 12th Grade9,7582.48%
High School Graduate56,71314.41%
Some College73,20918.60%
Associates Degree29,7807.57%
Bachelors Degree135,03034.30%
Graduate Degree82,58720.98%

Johnson County, Kansas Educational Attainment by Race

Name Total High School Bachelors
White328,479321,247188,996
Hispanic22,98716,7466,139
Asian19,15817,72513,281
Black16,92715,7126,166
Multiple Races6,1955,8683,011
Other Race3,3802,336676
Native American1,016938307
Islander897034

The highest rate of high school graduation is among white people with a rate of 97.80%.

The highest rate of bachelors degrees is among asian people with a rate of 69.32%.

Name Average Male Female
Overall$50,865$63,106$41,314
Less Than High School$24,912$28,910$19,051
High School Grad$31,723$37,722$25,969
Some College$40,016$47,333$34,180
Bachelors Degree$60,253$78,718$45,475
Graduate Degree$74,174$95,098$59,480

$50,865

Average Earnings

$63,106

Average Male

$41,314

Average Female

Johnson County, Kansas Language

Johnson County, Kansas Language by Age

Johnson County, Kansas Language

88.54% of Johnson County, Kansas residents speak only English, while 11.46% 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 Poverty

Johnson County, Kansas Poverty by Race

Name Total In Poverty Poverty Rate
White465,68918,3693.94%
Hispanic43,5316,92015.90%
Black26,8173,71913.87%
Asian28,6972,0397.11%
Multiple16,6491,88511.32%
Other5,51493616.97%
Native1,4491147.87%

5.58%

Overall Poverty Rate

4.99%

Male Poverty Rate

6.15%

Female Poverty Rate

Poverty in Johnson County, Kansas

The race most likely to be in poverty in Johnson County, Kansas is Other, with 16.97% below the poverty level.

The race least likely to be in poverty in Johnson County, Kansas is White, with 3.94% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.16%. Among those working part-time, it was 8.49%, and for those that did not work, the poverty rate was 10.20%.

Name Poverty
Less Than High School17.36%
High School7.56%
Some College5.87%
Bachelors or Greater2.25%
Name Poverty
Female Unemployed26.39%
Male Unemployed14.08%
Female Employed3.66%
Male Employed2.52%

Johnson County, Kansas Income

Johnson County, Kansas Income by Household Type

Name Median Mean
Households$84,915$114,336
Families$105,461$136,429
Married Families$118,337$151,093
Non Families$47,167$63,346

Johnson County, Kansas Marital Status

Johnson County, Kansas Marital Status

Marriage Rates

57.0%

Overall Marriage Rate

59.0%

Male Marriage Rate

55.1%

Female Marriage Rate

Johnson County, Kansas Married by Age and Sex

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

Johnson County, Kansas Veterans

28,653

Number of Veterans

26,694

Male Veterans

1,959

Female Veterans

War Veterans
Vietnam10,030
First Gulf War5,785
Second Gulf War4,858
Korea3,088
World War II1,565

Johnson County, Kansas Veterans by Race

Name Veterans % of Total
White26,6336.92%
Hispanic1,0633.85%
Black1,0245.18%
2 or More4125.21%
Asian3551.62%
Indian11910.62%
Other1022.56%
Hawaiian84.49%

Johnson County, Kansas Veterans by Education

3.88%

Veteran Poverty Rate

25.79%

Veteran Disability Rate

Johnson County, Kansas Employment Status

71.8%

Labor Force Participation

69.6%

Employment Rate

3.1%

Unemployment Rate

Johnson County, Kansas Place of Birth

Origin of Non Citizens

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

Origin of Naturalized Citizens

41.22%

Born in Kansas

91.28%

Native Born

8.72%

Foreign Born

4.65%

Non Citizen

Place of Birth

91.28% of Johnson County, Kansas residents were born in the United States, with 41.22% having been born in Kansas. 4.65% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Population of Cities in Johnson County, Kansas

City 2010 Census 2016 Estimated Growth Growth Rate
Overland Park173325188966156419.02%
Olathe12589513547395787.61%
Shawnee622096519429854.80%
Lenexa481885290347159.78%
Leawood318673456526988.47%
Prairie Village21447218053581.67%
Gardner1911521110199510.44%
Merriam11032112452131.93%
Mission932394431201.29%
Bonner Springs 731476653514.80%
Roeland Park67316786550.82%
Spring Hill 5438616672813.39%
De Soto572060713516.14%
Fairway38823972902.32%
Mission Hills349836001022.92%
Edgerton17351756211.21%
Westwood1506165815210.09%
Lake Quivira 906940343.75%
Westwood Hills359392339.19%
Mission Woods1781982011.24%
  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