The population of Rock Island county is estimated at 145,472. In 2017 there were 1,893 births and 1,443 deaths in Rock Island county. Rock Island county has 27,030 housing units that are owned with a mortgage or a loan, 15,388 that are owned free and clear and 18,885 that are renter occupied.

  The upstanding residents of Rock Island County filed 69,290 federal tax returns in 2017. This amount represents 1.1% of all Illinois filings and 0.046% of the entire nation. Rock Island had a combined total federal tax liability of $568,144,000 on earned income of $3,734,540,000. Other notable statistics from Rock Island County were 3,940 unemployment claims which collected a total of $19,253,000 and 11,080 charitable contributions valued at $52,319,000. 13,200 filings from Rock Island County paid a combined total of $62,299,000 in property taxes and 10,460 filings paid $52,025,000 on mortgage interest costs.

  In 2010 Rock Island county had 179 religious congregations with an estimated 63,088 members.
22.7% of the Rock Island population has a college level Bachelors degree or higher. 11.2% have less than a highschool diploma level education.

Approximately 43% of Rock Island County voted in the presidential election of 2016. This represents a decrease from the 2012 election by 1,909 votes.
At $51,805 the median income is 82.2% of the Illinois average. An estimated 3,551 people claimed to be unemployed last year in Rock Island, the equivalant of around 5.0% of the county population. This represents a decrease in the level of unemployment from the previous year's value of 6.2%.

Top 15 Industries in Rock Island County.
Total # Employed	Industry Job Type
8,883	Health care and social assistance
8,245	Manufacturing
7,931	Retail trade
5,924	Administrative and support and waste management and remediation services
5,853	Administrative and support services
5,592	Accommodation and food services
4,953	Food services and drinking places
4,778	Employment services
4,567	Machinery manufacturing
4,523	Restaurants and other eating places
4,062	Transportation and warehousing
3,026	Ambulatory health care services
2,913	Finance and insurance
2,847	Professional, scientific, and technical services
2,826	Wholesale trade

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