Peoria is a city located in Peoria County Illinois. It is also the county seat of Peoria County. With a 2020 population of 108,353, it is the 8th largest city in Illinois and the 285th largest city in the United States . Peoria is currently declining at a rate of -0.94% annually and its population has decreased by -5.79% since the most recent census, which recorded a population of 115,007 in 2010. Peoria reached it's highest population of 126,963 in 1970. Spanning over 50 miles, Peoria has a population density of 2,257 people per square mile.
The average household income in Peoria is $74,900 with a poverty rate of 19.67%. The median rental costs in recent years comes to $806 per month, and the median house value is $125,700. The median age in Peoria is 35.2 years, 33.6 years for males, and 36.7 years for females.