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This is a list of U.S. states, the District of Columbia and territories by median age in 2020. The median age is the index that divides the entire population into two numerically equal age groups, one younger than that age and the other older than that age. It is the only index associated with the age distribution of a population.
Illinois' population slightly declined in 2020 from the 2010 United States census by just over 18,000 residents and the overall population was quite higher than recent census estimates. [90] Illinois is the most populous state in the Midwest region .
More than half the population of the state of Illinois lives in the Chicago metropolitan area. The 2000 United States Census had shown the population density of the city itself was 12,750.3 people per square mile (4,923.0/km 2), making it one of the nation's most densely populated cities.
Website. www.cookcountyil.gov. Cook County is the most populous county in the U.S. state of Illinois and the second-most-populous county in the United States, after Los Angeles County, California. More than 40 percent of all residents of Illinois live within Cook County. As of 2020, the population was 5,275,541.
Decatur ( / dɪˈkeɪtər / dih-KAY-tər) is the largest city in and the county seat of Macon County, Illinois, United States. The city was founded in 1829 and is situated along the Sangamon River and Lake Decatur in Central Illinois. As of the 2020 census, it had a population of 70,522. [5] It is the seventeenth-most populous city in Illinois. [6]
17-59000. Website. www .peoriagov .org. Peoria ( / piˈɔːriə / pee-OR-ee-ə) is a city in and county seat of Peoria County, Illinois, United States. [4] Located on the Illinois River, the city had a population of 113,150 as of the 2020 census. [5] [6] It is the principal city of the Peoria metropolitan area in Central Illinois, consisting of ...
Population growth is fastest among minorities as a whole, and according to the Census Bureau's 2020 estimation, 50% of U.S. children under the age of 18 are members of ethnic minority groups. As of 2020, white people numbered 235,411,507 or 71% of the population, including people who identified as white in combination with another race.
The Chicago metropolitan area, also referred to as the Greater Chicago Area and Chicagoland, is the largest metropolitan statistical area in the U.S. state of Illinois, containing the City of Chicago along with its surrounding suburbs and satellite cities. Encompassing 10,286 square mi (28,120 km 2 ), the metropolitan area includes the city of ...