Johnson County
Johnson County is significantly wealthier than the US average, with a median household income of $109,208. Population has grown 38% since 2000. 58% of adults hold a bachelor's degree or higher, well above the national rate of 36%. Median home value has more than doubled since 2000, reaching $391,200. Poverty is rare here, at 5.4% of residents. It ranks in the top 1% of US counties for household income.
Population & growth
PEP 2025 EST:636,906 residents (Census Bureau Vintage 2025, released March 2026)
Income & economy
Housing
Race & ethnicity
Detailed origins & ancestry
+ 10 more hispanic origin groups with data
+ 8 more asian origin groups with data
+ 49 more ancestry groups with data
Education
Commute & transportation
Work & employment
People & community
Places similar to Johnson County
Compare Johnson County to nearby counties
How many people live in Johnson County, Kansas?
Johnson County, Kansas has about 620,631 residents according to the 2024 American Community Survey.
What is the median household income in Johnson County, Kansas?
The typical household in Johnson County, Kansas earns about $109,208 a year. Half of households make more than that, and half make less.
Is Johnson County, Kansas expensive?
In Johnson County, Kansas, the median home is worth about $391,200, and the typical rent is about $1,434 a month.
How educated are people in Johnson County, Kansas?
About 57.6% of adults age 25 and over in Johnson County, Kansas hold a bachelor's degree or higher.
What is the poverty rate in Johnson County, Kansas?
About 5.4% of people in Johnson County, Kansas live below the federal poverty line.
Has Johnson County, Kansas grown since 1990?
Yes, Johnson County, Kansas has grown since 1990. The population has added about 265,577 residents, a change of about 75 percent over that period.
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024