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The 2009 Cook County, IL, population is 5,285,107. There are 5,596 people per square mile (population density).
The median age is 35.4. The US median is 37.6. 50.07% of people in Cook County, IL, are married. 8.62% are divorced.
The average household size is 2.65 people. 20.89% of people are married, with children. 9.72% have children, but are single.
55.10% of people are white, 25.88% are black, 5.41% are asian, 0.33% are native american, and 13.56% claim 'Other'.
22.03% of the people in Cook County, IL, claim hispanic ethnicity (meaning 77.97% are non-hispanic).
Cook, IL People data
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