The 2016 Peoria County, Illinois, population is 186,221. There are 301 people per square mile (population density).
The median age is 36.8. The US median is 37.4. 48.28% of people in Peoria County, Illinois, are married. 10.96% are divorced.
The average household size is 2.39 people. 27.52% of people are married, with children. 20.25% have children, but are single.
71.71% of people are white, 17.47% are black, 3.46% are asian, 0.29% are native american, and 0.22% claim 'Other'.
4.23% of the people in Peoria County, Illinois, claim hispanic ethnicity (meaning 95.78% are non-hispanic).
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