The population of Jefferson county is estimated at 767,335 where 639,518 speak English exclusively and 6,768 speak primarily in another language. In 2017 there were 9,998 births and 7,440 deaths in Jefferson county. Jefferson county has 139,996 housing units that are owned with a mortgage or a loan, 55,001 that are owned free and clear and 114,178 that are renter occupied.

  The gracious residents of Jefferson County filed 373,690 federal tax returns in 2017. This amount represents 19.6% of all Kentucky filings and 0.251% of the entire nation. Jefferson had an impressive combined total federal tax liability of $3,904,704,000 on earned income of $23,308,020,000. Other notable statistics from Jefferson County were 12,450 unemployment claims which collected a total of $40,292,000 and 100,380 charitable contributions valued at $529,130,000. 104,090 filings from Jefferson County paid a combined total of $306,811,000 in property taxes and 89,480 filings paid $557,598,000 on mortgage interest costs.

  In 2010 Jefferson county had 704 religious congregations with an estimated 405,799 members.
32.3% of the Jefferson population has a college level Bachelors degree or higher. 10.3% have less than a highschool diploma level education.

Approximately 46% of Jefferson County voted in the presidential election of 2016. This represents an increase from the 2012 election by 13,278 votes.
At $54,977 the median income is 113.7% of the Kentucky average. An estimated 17,464 people claimed to be unemployed last year in Jefferson, the equivalant of around 4.4% of the county population. This represents a decrease in the level of unemployment from the previous year's value of 4.5%.

Top 15 Industries in Jefferson County.
Total # Employed	Industry Job Type
65,785	Health care and social assistance
41,294	Retail trade
40,666	Manufacturing
39,711	Accommodation and food services
35,870	Food services and drinking places
31,686	Restaurants and other eating places
29,965	Finance and insurance
29,694	Transportation and warehousing
29,367	Administrative and support and waste management and remediation services
28,379	Administrative and support services
23,824	Ambulatory health care services
22,198	Professional, scientific, and technical services
18,657	Insurance carriers and related activities
16,272	Full-service restaurants
15,867	Wholesale trade

In 2018 the average price reduction was 3.33% in Jefferson County (averaging across 25 zip codes a sample of which are; 40291, 40245, 40219 and 40220).

In 2018 20.14% of listings in Jefferson County (averaging across 28 zip codes a sample of which are; 40219, 40218, 40220 and 40210) dropped their price.

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