Illinois Population Rank: 6th in the U.S. (2020 Census)

Per the 2020 U.S. Census, Illinois has 12,671,821 residents, making it the 6th most populous state.

Ranking Context

1. California (39.5M)
2. Texas (29.1M)
3. Florida (21.5M)
4. New York (20.2M)
5. Pennsylvania (13.0M)
6. Illinois (12.7M)
7. Ohio (11.8M)
8. Georgia (10.7M)
9. North Carolina (10.4M)
10. Michigan (10.1M)

Trend Note

Illinois has lost population in each annual estimate since 2014 (domestic outmigration > immigration + natural increase). 2023 estimate: ~12.5M. It may fall to 7th behind Pennsylvania soon.

Chicago metro (9.4M) holds ~75% of state population.