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All Jefferson County population data above are from the US Census Bureau.
The population data for Jefferson County are from the Census' American Community Survey 2018 5-year estimates and the Census' 2019 Population Estimates. The demographic data for Atchison County, Dickinson County, Wabaunsee County, and Wallace County are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2018 5-year estimates, and were downloaded on 19 December 2019. Check out our FAQ section for more details.
With 19,043 people, Jefferson County is the 29th most populated county in the state of Kansas out of 105 counties. But watch out, Jefferson County, because Atchison County with 16,073 people and Dickinson County with 18,466 people are right behind you.
The largest Jefferson County racial/ethnic groups are White (93.7%) followed by Hispanic (2.6%) and Two or More (2.2%).
In 2018, the median household income of Jefferson County residents was $61,793. Jefferson County households made slightly more than Wabaunsee County households ($60,450) and Wallace County households ($58,875) . However, 8.0% of Jefferson County residents live in poverty.
The median age for Jefferson County residents is 44.2 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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