Total Population in Illinois
ACS 2024 5-Year Estimates
Total Population
13M
Rank #6 of 52
How Illinois Compares
Illinois
13M
National
330M
96.2% below
State Ranking
| Rank | State | Value |
|---|---|---|
| #3 | Florida | 22M |
| #4 | New York | 20M |
| #5 | Pennsylvania | 13M |
| #6 | Illinois | 13M |
| #7 | Ohio | 12M |
| #8 | Georgia | 11M |
| #9 | North Carolina | 11M |
Highest Population Counties in Illinois
| # | County | Population |
|---|---|---|
| 1 | Cook County | 5,182,090 |
| 2 | DuPage County | 930,024 |
| 3 | Lake County | 714,223 |
| 4 | Will County | 701,462 |
| 5 | Kane County | 517,255 |
| 6 | McHenry County | 312,591 |
| 7 | Winnebago County | 283,292 |
| 8 | Madison County | 264,238 |
| 9 | St. Clair County | 253,694 |
| 10 | Champaign County | 208,741 |
Lowest Population Counties in Illinois
| # | County | Population |
|---|---|---|
| 102 | Hardin County | 3,605 |
| 101 | Pope County | 3,739 |
| 100 | Calhoun County | 4,330 |
| 99 | Gallatin County | 4,819 |
| 98 | Alexander County | 4,875 |
| 97 | Scott County | 4,937 |
| 96 | Pulaski County | 5,015 |
| 95 | Stark County | 5,308 |
| 94 | Putnam County | 5,601 |
| 93 | Edwards County | 6,075 |
Total Population in Illinois
Illinois has a total population of 13M, ranking #6 of 52 among all 52 states and territories. This is 96.2% below the national value of 330M.
Across Illinois's 102 counties, total population ranges from 3,605 to 5,182,090. The county with the highest value is Cook County at 5,182,090.
Total population count from the American Community Survey.
About this data
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.