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All Johnson County population data above are from the US Census Bureau.
The population data for Johnson County are from the Census' American Community Survey 2017 5-year estimates and the Census' 2017 Population Estimates. The demographic data for Leavenworth County, Pottawatomie County, Sedgwick County, and Shawnee County are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2017 5-year estimates, and were downloaded on 6 December 2018. Check out our FAQ section for more details.
With 578,797 people, Johnson County is the 1st most populated county in the state of Kansas out of 105 counties. But watch out, Johnson County, because Sedgwick County with 510,484 people and Shawnee County with 178,392 people are right behind you.
The largest Johnson County racial/ethnic groups are White (80.5%) followed by Hispanic (7.4%) and Asian (4.7%).
In 2017, the median household income of Johnson County residents was $81,121. Johnson County households made slightly more than Leavenworth County households ($70,022) and Pottawatomie County households ($64,410) . However, 5.6% of Johnson County residents live in poverty.
The median age for Johnson County residents is 37.3 years young.
86% of people CANNOT find the data they're looking for on the US Census Bureau website. Source: Nielsen Norman Group
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