![Veera Korhonen](https://cdn.statcdn.com/static/../CMS/contactperson/ERI3517_1705922684.png)
U.S. population share of Illinois 2022, by age group
In 2022, about 13.4 percent of the population in Illinois was between the ages of 25 and 34 years old. A further 13.3 percent of people in Illinois were between the ages of 35 and 44 years old.