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The last county, Ford County, was created in 1859. Cook County, established in 1831 and named for the early Illinois Attorney General Daniel Pope Cook, contained the absolute majority of the state's population in the first half of the 20th century and retains more than 40% of it as of the 2020 census.
According to the 2020 census, it has a population of 516,522, [2] making it the fifth-most populous county in Illinois. Its county seat is Geneva, [3] and its largest city is Aurora. Kane County is one of the collar counties of the metropolitan statistical area designated "Chicago–Naperville–Elgin, IL–IN–WI" by the US census.
Locally, Sangamon County saw a decrease from July 1 of 2020 to 2023 of 196,144 to 193,491, or 1.35% of the county's population was lost. An aerial view of Springfield is seen on Monday, April 1, 2024.
Logan County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 27,987. [1] Its county seat is Lincoln. [2] Logan County comprises the Lincoln, IL Micropolitan Statistical Area, which is included in the Springfield-Jacksonville-Lincoln, IL Combined Statistical Area.
Thursday’s numbers show Illinois’ population in 2020 was 12.79 million people. The following year, the state was 12.70 million people. In 2022, Illinois continued to shrink with 12.62 million ...
As of the 2020 United States census, there were 65,737 people, 27,199 households, and 17,398 families residing in the county. [11] The population density was 75.5 inhabitants per square mile (29.2/km 2). There were 30,235 housing units at an average density of 34.7 per square mile (13.4/km 2). The racial makeup of the county was 89.5% white, 3. ...
Madison County is a county in the U.S. state of Illinois.It is a part of the Metro East in southern Illinois.According to the 2020 census, it had a population of 264,776, [1] making it the eighth-most populous county in Illinois and the most populous in the southern portion of the state.
The per capita income for the county was $22,874. About 9.5% of families and 13.8% of the population were below the poverty line, including 15.1% of those under age 18 and 11.9% of those age 65 or over. [16] Richland is the top ranked most affordable county in Illinois to buy a car and is on average $932 less expensive than other Illinois counties.