Illinois has experienced a third consecutive year of population growth, according to estimates released today by the U.S. Census Bureau. Between July 1, 2024, and July 1, 2025, the state added 16,108 residents, building on an increase of over 100,000 residents since 2022.
Growth Factors
The state’s population gains are attributed to a combination of factors, including more births than deaths and a slowing rate of residents moving out of state. Approximately 125,000 births occurred in Illinois during the period, compared to 114,000 deaths, resulting in a natural population increase of roughly 11,000 people.
Net domestic outmigration – the number of people leaving Illinois for other states – fell to 40,017 residents, the lowest level recorded in 15 years. This suggests a potential shift in the state’s appeal to residents.
Efforts to Improve Data Accuracy
The latest population estimates also reflect ongoing work by Illinois officials to refine census data. A Post-Census Group Quarters Review identified more than 46,000 additional residents, which have now been included in population calculations.
Governor JB Pritzker stated, “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.” He emphasized the state’s investments in education, public safety, and economic opportunity as key drivers of this trend.
Looking Ahead
If current trends continue, Illinois could see further population gains in the coming years. However, sustained growth will likely depend on continued investment in areas that attract and retain residents. A possible next step for the state could be to analyze the reasons behind the slowing outmigration to better target policies and programs. It is also likely that state officials will continue to prioritize accurate data collection to ensure effective resource allocation.
Frequently Asked Questions
What period does this population estimate cover?
The estimates released today cover the period between July 1, 2024, and July 1, 2025.
How many residents has Illinois added since 2022?
Illinois has added more than 100,000 residents since 2022.
What contributed to the population growth?
Population growth was due to a combination of natural population gains – more births than deaths – and a slowing of residents moving out of state.
What factors might influence Illinois’ population trends in the future?
