State
Illinois
12,694,798 residents · 1575 cities · 102 counties · 1390 ZIP codes
Population
12,694,798
Cities
1575
Counties
102
ZIP Codes
1390
Loading map…
Largest Cities in Illinois
| # | City | Population | County |
|---|---|---|---|
| 1 | Chicago, IL | 8,609,571 | Cook County |
| 2 | Rockford, IL | 271,411 | Winnebago County |
| 3 | Round Lake Beach, IL | 264,501 | Lake County |
| 4 | Peoria, IL | 255,063 | Peoria County |
| 5 | Aurora, IL | 179,898 | Kane County |
| 6 | Springfield, IL | 157,178 | Sangamon County |
| 7 | Champaign, IL | 153,687 | Champaign County |
| 8 | Naperville, IL | 150,692 | DuPage County |
| 9 | Joliet, IL | 150,445 | Will County |
| 10 | Bloomington, IL | 135,296 | McLean County |
| 11 | Elgin, IL | 114,934 | Kane County |
| 12 | Waukegan, IL | 89,076 | Lake County |
| 13 | Cicero, IL | 82,797 | Cook County |
| 14 | Alton, IL | 80,162 | Madison County |
| 15 | Decatur, IL | 80,124 | Macon County |
| 16 | Schaumburg, IL | 76,868 | Cook County |
| 17 | Evanston, IL | 76,340 | Cook County |
| 18 | Arlington Heights, IL | 76,005 | Cook County |
| 19 | Bolingbrook, IL | 74,096 | Will County |
| 20 | DeKalb, IL | 66,570 | DeKalb County |
All Cities in Illinois
Chicago, ILPop. 8,609,571Rockford, ILPop. 271,411Round Lake Beach, ILPop. 264,501Peoria, ILPop. 255,063Aurora, ILPop. 179,898Springfield, ILPop. 157,178Champaign, ILPop. 153,687Naperville, ILPop. 150,692Joliet, ILPop. 150,445Bloomington, ILPop. 135,296Elgin, ILPop. 114,934Waukegan, ILPop. 89,076Cicero, ILPop. 82,797Alton, ILPop. 80,162Decatur, ILPop. 80,124Schaumburg, ILPop. 76,868Evanston, ILPop. 76,340Arlington Heights, ILPop. 76,005Bolingbrook, ILPop. 74,096DeKalb, ILPop. 66,570Palatine, ILPop. 66,293Skokie, ILPop. 66,219Kankakee, ILPop. 65,635Des Plaines, ILPop. 59,156Orland Park, ILPop. 57,916Saint Charles, ILPop. 56,955Oak Lawn, ILPop. 56,861Mchenry, ILPop. 56,402Berwyn, ILPop. 55,595Mount Prospect, ILPop. 55,472Tinley Park, ILPop. 54,842Normal, ILPop. 53,569Wheaton, ILPop. 53,557Oak Park, ILPop. 53,292Hoffman Estates, ILPop. 51,175Downers Grove, ILPop. 50,054Glenview, ILPop. 47,752Plainfield, ILPop. 46,708Elmhurst, ILPop. 45,671Lombard, ILPop. 43,619Buffalo Grove, ILPop. 42,891Dekalb, ILPop. 42,536Moline, ILPop. 42,197Belleville, ILPop. 41,370Romeoville, ILPop. 41,152East Saint Louis, ILPop. 40,843Crystal Lake, ILPop. 40,579Bartlett, ILPop. 40,501Carol Stream, ILPop. 39,460Urbana, ILPop. 39,341
Counties in Illinois
Cook CountyPop. 5,182,090DuPage CountyPop. 930,024Lake CountyPop. 714,223Will CountyPop. 701,462Kane CountyPop. 517,255McHenry CountyPop. 312,591Winnebago CountyPop. 283,292Madison CountyPop. 264,238St. Clair CountyPop. 253,694Champaign CountyPop. 208,741Sangamon CountyPop. 194,947Peoria CountyPop. 179,645McLean CountyPop. 171,556Rock Island CountyPop. 142,757Kendall CountyPop. 137,675Tazewell CountyPop. 130,290LaSalle CountyPop. 108,714Kankakee CountyPop. 106,635Macon CountyPop. 101,849DeKalb CountyPop. 100,703Vermilion CountyPop. 72,386Williamson CountyPop. 66,876Adams CountyPop. 64,754Whiteside CountyPop. 54,947Boone CountyPop. 53,230Grundy CountyPop. 53,219Jackson CountyPop. 53,064Ogle CountyPop. 51,495Knox CountyPop. 49,046Henry CountyPop. 48,643