County · Kansas
Johnson County, Kansas
Johnson County, Kansas. Johnson County had 636,906 residents in 2025 by the Census Bureau's estimate, up 4.4% since 2020, faster than Kansas (+1.3%). It holds 26 places (20 cities, villages and boroughs and 6 towns and townships) and 154 census tracts. GEOID 20091.
Johnson County is one of the 14 counties of the Kansas City, MO-KS metropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
636,906
Census Bureau estimate (no margin published)
2020 Census count: 609,863 · ACS 2020-2024: 620,631
Median household income
$109,208
±$1,170 (90% margin)
Kansas: $74,275
Median home value
$391,200
±$3,069 (90% margin)
Kansas: $217,200
Median gross rent
$1,434
±$16 (90% margin)
Kansas: $1,060
How many people live in Johnson County, and is it growing?
The 2020 Census counted 609,863 residents in Johnson County. The Census Bureau estimates 636,906 for July 1, 2025, up 4.4% since 2020, faster than Kansas (+1.3%). The 2020-2024 American Community Survey puts the population at 620,631 over 474 square miles of land.
| Measure | Johnson County | Kansas | Change since 2015-2019 |
|---|---|---|---|
| Total population | 620,631 | 2,947,197 | +29,125 |
| Households | 249,531±1,006 | 1,174,060 | +20,939 |
| Average household size | 2.46±0.01 | 2.44 | −0.11 |
| Housing units | 259,655±181 | 1,293,635 | +17,888 |
Johnson County's population since 2000
From 451,086 in 2000 to 636,906 in 2025: up 41.2%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Johnson County?
Johnson County holds 26 places: 20 cities, villages and boroughs (incorporated places) and 6 towns and townships (county subdivisions with their own government). The largest is Overland Park with 203,677 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Overland Park | 197,238 | $104,834 |
|---|---|---|
| Olathe | 141,290 | $114,009 |
| Shawnee | 67,311 | $109,940 |
| Lenexa | 57,434 | $103,239 |
| Leawood | 33,902 | $185,625 |
| Gardner | 23,287 | $96,818 |
| Prairie Village | 22,957 | $113,530 |
| Merriam | 11,098 | $73,600 |
| Mission | 9,954 | $75,534 |
| Roeland Park | 6,871 | $88,774 |
| De Soto | 6,118 | $104,000 |
| Spring Hill | 7,952 | $112,428 |
| Aubry Township | 4,650 | $134,081 |
| Fairway | 4,170 | $152,574 |
| Mission HillsGEOID 2047350 | 3,594 | $250,000 or more |
| Gardner Township | 2,593 | $116,136 |
| Oxford Township, Johnson CountyGEOID 2009153825 | 2,027 | $163,333 |
| Spring Hill TownshipGEOID 2009167650 | 2,004 | $110,536 |
| Westwood | 1,750 | $118,250 |
| Edgerton | 1,748 | $84,838 |
| Lexington Township, Johnson CountyGEOID 2009139800 | 1,497 | $135,068 |
| McCamish Township | 980 | $122,321 |
| Lake Quivira | 1,014 | $177,917 |
| Westwood Hills | 400 | $190,625 |
| Mission WoodsGEOID 2047425 | 203 | $163,750 |
| Bonner Springs | 7,837 | $83,218 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Johnson County?
The median resident of Johnson County is 38.6 years old; 23.5% are under 18 and 16.0% are 65 or older. The largest group is non-Hispanic white residents at 76.1%, then Hispanic or Latino residents (of any race) at 9.3%. 9.2% of residents were born outside the United States.
| Measure | Johnson County | Kansas | Change since 2015-2019 |
|---|---|---|---|
| Median age | 38.6±0.2 | 37.4 | +1.0 |
| Under 18 years | 23.5%±0.1 pts | 23.8% | – |
| 65 years and over | 16.0%±0.1 pts | 17.0% | – |
| Hispanic or Latino (any race) | 9.3% | 13.6% | +1.6 pts |
| White alone, not Hispanic | 76.1%±0.2 pts | 72.7% | −3.8 pts |
| Black or African American alone, not Hispanic | 4.8%±0.2 pts | 5.2% | no clear change |
| Asian alone, not Hispanic | 5.2%±0.1 pts | 2.9% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.1%±0.1 pts | 0.4% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.1% | – |
| Two or more races, not Hispanic | 4.0%±0.3 pts | 4.8% | – |
| Some other race alone, not Hispanic | 0.4%±0.1 pts | 0.4% | – |
| Born outside the United States | 9.2%±0.3 pts | 7.4% | no clear change |
| Speak a language other than English at home (age 5+) | 12.1%±0.4 pts | 12.1% | – |
| Civilian veterans (age 18+) | 5.3%±0.2 pts | 6.8% | – |
| With a disability | 9.0%±0.3 pts | 13.5% | – |
| No health insurance coverage | 4.9%±0.3 pts | 8.8% | −1.0 pts |
| High school graduate or higher (age 25+) | 96.6%±0.3 pts | 92.0% | – |
| Bachelor's degree or higher (age 25+) | 57.6%±0.7 pts | 35.6% | +1.6 pts |
| Graduate or professional degree (age 25+) | 22.9%±0.6 pts | 13.4% | – |
| Moved from another state in the past year | 4.0%±0.3 pts | 3.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Johnson County earn?
Half of Johnson County's 249,531 households earn less than $109,208 a year (±$1,170), against $74,275 in Kansas. In 2015-2019 it was $109,639 in 2024 dollars; the margins of error cannot tell the two periods apart. 5.4% of residents live below the poverty line.
| Measure | Johnson County | Kansas | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $109,208±$1,170 | $74,275 | no clear change |
| Mean household income | $146,136±$2,083 | $100,417 | – |
| Per capita income | $60,137±$1,345 | $40,978 | +$2,889 |
| People below the poverty line | 5.4%±0.3 pts | 11.3% | no clear change |
| Children under 18 below the poverty line | 5.2%±0.7 pts | 13.1% | −1.0 pts |
| Households receiving SNAP | 2.0%±0.2 pts | 6.8% | – |
| Households with a broadband subscription | 95.9%±0.3 pts | 90.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Johnson County?
Owners occupy 68.5% of Johnson County's occupied homes and renters 31.5%. The median owner-occupied home is valued at $391,200 by its owner (±$3,069). The median renter pays $1,434 a month including utilities, and 32.9% of renters pay 35% or more of their income on rent.
| Measure | Johnson County | Kansas | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $391,200±$3,069 | $217,200 | +$71,712 |
| Median gross rent | $1,434±$16 | $1,060 | +$69 |
| Renters paying 35% or more of income on rent | 32.9%±1.2 pts | 34.5% | +2.4 pts |
| Median monthly owner costs, with a mortgage | $2,254±$23 | $1,689 | – |
| Owner-occupied homes | 68.5%±0.6 pts | 67.2% | no clear change |
| Housing units | 259,655±181 | 1,293,635 | +17,888 |
| Homeowner vacancy rate | 0.4%±0.1 pts | 0.9% | – |
| Rental vacancy rate | 5.5%±0.7 pts | 6.2% | – |
| Single-family detached homes | 66.2%±0.6 pts | 71.8% | – |
| Mobile homes | 0.7%±0.1 pts | 4.0% | – |
| Built 2020 or later | 2.6%±0.3 pts | 1.4% | – |
| Built 1939 or earlier | 2.6%±0.3 pts | 15.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Johnson County building?
Builders took permits for 3,237 new housing units across Johnson County in 2025 (2,055 single-family), 5.1 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Johnson County get to work?
69.5% of Johnson County's workers drive alone and 22.4% work from home. The average trip to work takes 20.6 minutes. The unemployment rate in 2020-2024 averaged 3.2%.
| Measure | Johnson County | Kansas | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 71.7%±0.4 pts | 66.1% | – |
| Unemployment rate | 3.2%±0.3 pts | 3.9% | no clear change |
| Drove alone to work | 69.5%±0.7 pts | 75.4% | – |
| Carpooled | 5.9%±0.4 pts | 8.7% | – |
| Public transportation | 0.2%±0.1 pts | 0.4% | – |
| Walked | 0.9%±0.1 pts | 2.3% | – |
| Worked from home | 22.4%±0.7 pts | 11.8% | +15.7 pts |
| Mean travel time to work | 20.6 min±0.2 | 19.7 min | −0.4 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Johnson County's census tracts?
Johnson County is divided into 154 census tracts. Among those with a reliable estimate, median household income runs from $49,239 (Tract 535.55) to $250,000 or more (Tract 508).
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Johnson County compare with Kansas's other counties?
| Measure | Rank |
|---|---|
| Population | 1st of 105 |
| Growth 2020-2025 | 3rd of 105 |
| Residents per square mile | 1st of 105 |
| Median household income | 1st of 105 |
| Median home value | 1st of 105 |
| Median gross rent | 1st of 104 |
| Poverty rate | 100th of 102 |
| Bachelor's degree or higher | 1st of 105 |
| Median age | 80th of 105 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Johnson County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.