The 2016 Illinois, Illinois, population is 12,860,000. There are 232 people per square mile (population density).
The median age is 37. The US median is 37.4. 49.75% of people in Illinois, Illinois, are married. 9.84% are divorced.
The average household size is 2.63 people. 32.88% of people are married, with children. 16.31% have children, but are single.
62.86% of people are white, 14.16% are black, 4.84% are asian, 0.11% are native american, and 0.13% claim 'Other'.
16.28% of the people in Illinois, Illinois, claim hispanic ethnicity (meaning 83.72% are non-hispanic).
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