CHICAGO – Illinois’ population has grown for the third consecutive year, according to new estimates from the U.S. Census Bureau released Tuesday. Between July 1, 2024, and July 1, 2025, Illinois added 16,108 residents – an increase of more than 100,000 residents since 2022.

“Illinois recorded its third consecutive year of population growth, as the state remains focused on strengthening the factors that help people choose to stay and build their lives here,” said Governor JB Pritzker. “That’s why we are focused on making long-term investments in education, public safety, and economic opportunity — so families can raise their kids here, workers can build careers, and entrepreneurs can start and grow businesses across Illinois.”

Illinois experienced population growth in the last year, in part due to natural population gains and slowing domestic outmigration. ​ ​

• Illinois birth rate continued to outpace deaths with approximately 125,000 births and 114,000 deaths, providing a net of approximately, 11,000 more residents.
• Net domestic outmigration fell to 40,017 residents — ​ the lowest level in 15 years.

Recent population estimates also reflect ongoing efforts from state officials to improve the accuracy of Illinois’ census data. Following the 2020 Census, the U.S. Census Bureau’s Post-Enumeration Survey found Illinois was undercounted by approximately 250,000 people, reflecting Illinois crossing 13 million residents. A subsequent Post-Census Group Quarters Review also identified more than 46,000 additional residents now incorporated into population estimates in later years.