Middlesex County is the wealthiest county in Massachusetts. Lowell is the largest city located within this county.
  The population of Middlesex county is estimated at 1,594,314 where 1,076,773 speak English exclusively and 22,930 speak primarily in another language. In 2017 there were 17,193 births and 11,702 deaths in Middlesex county. Middlesex county has 268,147 housing units that are owned with a mortgage or a loan, 92,942 that are owned free and clear and 219,599 that are renter occupied.

  The residents of Middlesex County filed 797,830 federal tax returns in 2017. This amount represents 23.4% of all Massachusetts filings and 0.535% of the entire nation. Middlesex had an astronomical combined total federal tax liability of $18,129,901,000 on earned income of $90,164,314,000. Other notable statistics from Middlesex County were 32,240 unemployment claims which collected a total of $238,376,000 and 276,750 charitable contributions valued at $2,034,411,000. 291,800 filings from Middlesex County paid a combined total of $2,262,236,000 in property taxes and 237,790 filings paid $2,400,955,000 on mortgage interest costs.

  In 2010 Middlesex county had 915 religious congregations with an estimated 923,929 members.
54.1% of the Middlesex population has a college level Bachelors degree or higher. 7.2% have less than a highschool diploma level education.

Approximately 48% of Middlesex County voted in the presidential election of 2016. This represents an increase from the 2012 election by 20,481 votes.
At $97,851 the median income is 126.4% of the Massachusetts average. An estimated 26,967 people claimed to be unemployed last year in Middlesex, 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 3.2%.

Top 15 Industries in Middlesex County.
Total # Employed	Industry Job Type
124,041	Health care and social assistance
111,444	Professional, scientific, and technical services
80,738	Retail trade
65,749	Administrative and support and waste management and remediation services
64,105	Administrative and support services
59,454	Manufacturing
59,109	Accommodation and food services
53,542	Information
52,911	Food services and drinking places
45,469	Restaurants and other eating places
41,470	Ambulatory health care services
41,092	Hospitals
36,339	Wholesale trade
34,471	General medical and surgical hospitals
32,786	Research and development in the physical, engineering, and life sciences

In 2018 the average price reduction was 2.77% in Middlesex County (averaging across 19 zip codes a sample of which are; 1887, 1450, 1852, 1752 and 1879).

In 2018 19.26% of listings in Middlesex County (averaging across 34 zip codes a sample of which are; 1746, 1854, 1864, 2459 and 1867) dropped their price.

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