The population of Fairfax county is estimated at 1,144,636 where 644,111 speak English exclusively and 38,638 speak primarily in another language. In 2017 there were 13,949 births and 5,671 deaths in Fairfax county. Fairfax county has 230,326 housing units that are owned with a mortgage or a loan, 41,907 that are owned free and clear and 119,394 that are renter occupied.

  The good residents of Fairfax County filed 547,290 federal tax returns in 2017. This amount represents 14.0% of all Virginia filings and 0.367% of the entire nation. Fairfax had an astronomical combined total federal tax liability of $12,585,039,000 on earned income of $64,524,563,000. Other notable statistics from Fairfax County were 8,260 unemployment claims which collected a total of $35,720,000 and 232,580 charitable contributions valued at $1,540,370,000. 234,460 filings from Fairfax County paid a combined total of $1,662,430,000 in property taxes and 204,910 filings paid $2,566,111,000 on mortgage interest costs.

  In 2010 Fairfax county had 627 religious congregations with an estimated 486,358 members.
60.7% of the Fairfax population has a college level Bachelors degree or higher. 8.0% have less than a highschool diploma level education.

Approximately 47% of Fairfax County voted in the presidential election of 2016. This represents an increase from the 2012 election by 102,684 votes.
At $117,989 the median income is 165.0% of the Virginia average. An estimated 19,167 people claimed to be unemployed last year in Fairfax, the equivalant of around 3.0% of the county population. This represents a decrease in the level of unemployment from the previous year's value of 3.3%.

Top 15 Industries in Fairfax County.
Total # Employed	Industry Job Type
197,134	Professional, scientific, and technical services
101,201	Computer systems design and related services
65,224	Administrative and support and waste management and remediation services
64,394	Administrative and support services
52,008	Health care and social assistance
50,244	Retail trade
48,334	Computer systems design services
39,728	Computer systems integrators
39,514	Accommodation and food services
35,346	Information
34,301	Food services and drinking places
34,060	Management, scientific, and technical consulting services
31,472	Restaurants and other eating places
30,652	Architectural, engineering, and related services
30,375	Management consulting services

In 2018 the average price reduction was 2.38% in Fairfax County (averaging across 30 zip codes a sample of which are; 22312, 22182, 22180, 20171 and 22315).

In 2018 14.70% of listings in Fairfax County (averaging across 38 zip codes a sample of which are; 22150, 22079, 22181, 22039 and 22041) dropped their price.

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