The population of Cook county is estimated at 5,231,356 where 3,189,642 speak English exclusively and 82,862 speak primarily in another language. In 2017 there were 66,843 births and 41,675 deaths in Cook county. Cook county has 846,809 housing units that are owned with a mortgage or a loan, 297,048 that are owned free and clear and 822,499 that are renter occupied.

  The good residents of Cook County filed 2,520,680 federal tax returns in 2017. This amount represents 41.3% of all Illinois filings and 1.691% of the entire nation. Cook had an astronomical combined total federal tax liability of $36,965,778,000 on earned income of $189,351,701,000. Other notable statistics from Cook County were 88,510 unemployment claims which collected a total of $505,190,000 and 656,850 charitable contributions valued at $4,632,819,000. 666,190 filings from Cook County paid a combined total of $4,777,565,000 in property taxes and 558,330 filings paid $4,649,797,000 on mortgage interest costs.

  In 2010 Cook county had 3,354 religious congregations with an estimated 3,097,119 members.
37.2% of the Cook population has a college level Bachelors degree or higher. 13.8% have less than a highschool diploma level education.

Approximately 39% of Cook County voted in the presidential election of 2016. This represents an increase from the 2012 election by 110,814 votes.
At $61,401 the median income is 97.4% of the Illinois average. An estimated 139,040 people claimed to be unemployed last year in Cook, the equivalant of around 5.2% of the county population. This represents a decrease in the level of unemployment from the previous year's value of 6.1%.

Top 15 Industries in Cook County.
Total # Employed	Industry Job Type
358,374	Health care and social assistance
222,918	Retail trade
217,861	Professional, scientific, and technical services
211,047	Administrative and support and waste management and remediation services
207,364	Accommodation and food services
204,878	Administrative and support services
181,315	Manufacturing
179,020	Food services and drinking places
153,303	Finance and insurance
149,556	Restaurants and other eating places
123,747	Ambulatory health care services
120,754	Hospitals
106,154	Transportation and warehousing
104,876	Employment services
94,754	Wholesale trade

In 2018 the average price reduction was 3.09% in Cook County (averaging across 137 zip codes a sample of which are; 60653, 60018, 60022, 60461 and 60526).

In 2018 18.09% of listings in Cook County (averaging across 144 zip codes a sample of which are; 60714, 60612, 60526 and 60076) dropped their price.

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