Johnson County, Kansas Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 1st-largest in Kansas
The population of Johnson County, Kansas is 614,764 as of the 2023 American Community Survey, making it the 1st-largest county in Kansas. The median household income is $107,261, the median home value is $366,000, and the median age is 38.3.
The population of Johnson County has grown 15.9% since 2010 (545,681 → 632,276), a +1.06% annualized rate.
614,764
Population
+1.06%
Annual growth
1298
People / sq mi
$107,261
Median Income
$366,000
Median Home Value
Johnson County covers 474 sq mi of land at 1298.0 people per square mile.
About Johnson County, KS
Johnson County is a county in Kansas with a population of 614,764. It ranks #1 among counties in Kansas by population. The median age is 38.3, in line with the national median. The population is 49.4% male and 50.6% female.
The median household income in Johnson County is $107,261, above the US median of $74,580. 3.4% of residents live below the federal poverty level. Home values sit at a median of $366,000, with monthly rent averaging $1,385. The homeownership rate of 68.6% is higher than the national rate of 64.8%.
Educational attainment in Johnson County reflects 56.9% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 20.0% of workers primarily work from home, noticeably above the national work-from-home rate of 14.2%. The average commute is 20.7 minutes each way.
Johnson County Population History (2010-2024)
The county of Johnson County had a population of 545,681 in 2010 and 632,276 in 2024, a 15.9% growth over 14 years. The peak was 632,276 in 2024. Average annual growth rate: 1.06%.
632,276
Population (2024)
545,681
Population (2010)
632,276
Peak (2024)
1.06%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 545,681 |
| 2011 | 553,034 |
| 2012 | 559,647 |
| 2013 | 566,661 |
| 2014 | 573,322 |
| 2015 | 580,158 |
| 2016 | 586,601 |
| 2017 | 592,055 |
| 2018 | 599,045 |
| 2019 | 602,948 |
| 2020 | 611,161 |
| 2021 | 614,962 |
| 2022 | 619,311 |
| 2023 | 625,444 |
| 2024 | 632,276 |
Race & Ethnicity
| White | 80.2% |
| Black or African American | 4.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.4% |
| Two or More Races | 0.0% |
Age & Sex
38.3
Median Age
50.6%
Female
49.4%
Male
15.5%
Age 65+
Age Distribution
Children (under 15): 19.5% · Seniors (65+): 15.5%
Income & Poverty
| Median household income | $107,261+$34,622 vs state |
| Mean household income | $142,699 |
| Per-capita income | $58,292 |
| Poverty rate | 3.4%-4.3% vs state |
| Unemployment rate | 2.3% |
| Employment-to-population | 69.4% |
Top Industries by Employment
The largest employment sector in Johnson County is professional & business services, accounting for 23.1% of workers.
How residents commute
0.2%
Drive alone
0.9%
Carpool
72.2%
Public transit
20.0%
Work from home
20.7 min
Avg commute
Housing
$366,000+$162,600 vs state
Median home value
$1,385
Median rent
68.6%
Homeownership rate
255,320
Total housing units
95.9%
Occupied
4.1%
Vacant
31.4%
Renter-occupied
Social & access
94.9%
With health insurance
97.7%
With broadband internet
47.3%
Foreign-born
5.6%
Veterans (18+)
8.9%
With a disability
87.7%
Speak language other than English at home
Education
96.5%
High School+
56.9%
Bachelor's+
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County rankings
Common questions about Johnson County, KS
Frequently Asked Questions
Johnson County, Kansas has a population of 614,764 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 1st-largest county in Kansas. Population density is 1298 people per square mile.
The population of Johnson County has grown 15.9% since 2010 (545,681 → 632,276), a +1.06% annualized rate.
The median household income in Johnson County, Kansas is $107,261, with mean (average) household income of $142,699 and per-capita income of $58,292. 3.4% of residents live below the federal poverty level.
In Johnson County, the largest racial and ethnic groups are White (80.2%), Black or African American (4.9%), Hispanic or Latino (1.4%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Johnson County, Kansas is 38.3 years. Residents are 50.6% female and 49.4% male.
The median home value in Johnson County is $366,000 and median monthly rent is $1,385. 68.6% of occupied housing units are owner-occupied. The county has 255,320 total housing units, 4.1% of which are vacant.
The largest employment sector in Johnson County, Kansas is professional, scientific, and management services, employing 23.1% of workers. The unemployment rate is 2.3%.
Wichita is among the largest cities associated with Johnson County, Kansas, with a population of 396,488.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.