The population of Jefferson county is estimated at 18,856. In 2017 there were 182 births and 144 deaths in Jefferson county. Jefferson county has 4,056 housing units that are owned with a mortgage or a loan, 2,138 that are owned free and clear and 1,172 that are renter occupied.

  The gracious residents of Jefferson County filed 8,560 federal tax returns in 2017. This amount represents 0.6% of all Kansas filings and 0.006% of the entire nation. Jefferson had a combined total federal tax liability of $63,140,000 on earned income of $480,384,000. Other notable statistics from Jefferson County were 390 unemployment claims which collected a total of $1,150,000 and 1,610 charitable contributions valued at $5,620,000. 2,030 filings from Jefferson County paid a combined total of $6,170,000 in property taxes and 1,680 filings paid $10,189,000 on mortgage interest costs.

  In 2010 Jefferson county had 39 religious congregations with an estimated 7,590 members.
21.2% of the Jefferson population has a college level Bachelors degree or higher. 7.4% have less than a highschool diploma level education.

Approximately 43% of Jefferson County voted in the presidential election of 2016. This represents an increase from the 2012 election by 426 votes.
At $66,044 the median income is 117.1% of the Kansas average. An estimated 360 people claimed to be unemployed last year in Jefferson, the equivalant of around 3.6% of the county population. This represents a decrease in the level of unemployment from the previous year's value of 3.9%.

Top 15 Industries in Jefferson County.
Total # Employed	Industry Job Type
318	Retail trade
282	Manufacturing
205	Nursing and residential care facilities
140	Nursing care facilities (skilled nursing facilities)
138	Food and beverage stores
96	Gasoline stations
66	Administrative and support and waste management and remediation services
54	Professional, scientific, and technical services
54	Commercial banking
54	State commercial banks (banking)
31	Services to buildings and dwellings
20	Wholesale trade
19	Offices of other health practitioners
17	Miscellaneous store retailers
14	Beer, wine, and liquor stores

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