The population of Middlesex county is estimated at 839,986 where 446,092 speak English exclusively and 15,564 speak primarily in another language. In 2017 there were 9,025 births and 6,170 deaths in Middlesex county. Middlesex county has 136,540 housing units that are owned with a mortgage or a loan, 50,607 that are owned free and clear and 94,039 that are renter occupied.

  The residents of Middlesex County filed 404,770 federal tax returns in 2017. This amount represents 9.2% of all New Jersey filings and 0.272% of the entire nation. Middlesex had an incredible combined total federal tax liability of $5,151,903,000 on earned income of $31,382,802,000. Other notable statistics from Middlesex County were 21,600 unemployment claims which collected a total of $136,421,000 and 140,890 charitable contributions valued at $504,170,000. 145,160 filings from Middlesex County paid a combined total of $1,318,621,000 in property taxes and 115,610 filings paid $958,545,000 on mortgage interest costs.

  In 2010 Middlesex county had 421 religious congregations with an estimated 455,416 members.
42.0% of the Middlesex population has a college level Bachelors degree or higher. 10.7% have less than a highschool diploma level education.

Approximately 34% of Middlesex County voted in the presidential election of 2016. This is a decrease from the 2012 election by 2,564 votes.
At $85,187 the median income is 106.3% of the New Jersey average. An estimated 18,112 people claimed to be unemployed last year in Middlesex, the equivalant of around 4.1% of the county population. This represents a decrease in the level of unemployment from the previous year's value of 4.4%.

Top 15 Industries in Middlesex County.
Total # Employed	Industry Job Type
52,820	Administrative and support and waste management and remediation services
51,218	Administrative and support services
50,970	Professional, scientific, and technical services
46,302	Health care and social assistance
38,315	Retail trade
35,938	Employment services
33,984	Wholesale trade
29,126	Computer systems design and related services
28,277	Manufacturing
24,170	Transportation and warehousing
23,174	Temporary help services
21,988	Accommodation and food services
19,293	Food services and drinking places
18,978	Custom computer programming services
18,508	Merchant wholesalers, nondurable goods

In 2018 the average price reduction was 3.49% in Middlesex County (averaging across 25 zip codes a sample of which are; 7095, 8817, 7080, 8857 and 8872).

In 2018 13.29% of listings in Middlesex County (averaging across 30 zip codes a sample of which are; 8850, 7095, 8859, 8840 and 8884) dropped their price.

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