24 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bloomington | 1 | 78,521 | 78,685 | -0.04% | 2,896 | 27.11 | City |
| Normal | 2 | 52,528 | 52,752 | -0.09% | 2,847 | 18.45 | Town |
| Le Roy | 3 | 3,439 | 3,509 | -0.4% | 1,431 | 2.40 | City |
| Heyworth | 4 | 2,910 | 2,794 | 0.8% | 875 | 3.33 | Village |
| Lexington | 5 | 2,060 | 2,094 | -0.34% | 1,006 | 2.05 | City |
| Hudson | 6 | 1,738 | 1,760 | -0.23% | 2,122 | 0.82 | Village |
| Chenoa | 7 | 1,674 | 1,719 | -0.53% | 689 | 2.43 | City |
| Gridley | 8 | 1,420 | 1,455 | -0.49% | 1,152 | 1.23 | Village |
| Twin Grove | 9 | 1,374 | 1,243 | -0.94% | 347 | 3.96 | CDP |
| Downs | 10 | 1,164 | 1,196 | -0.51% | 388 | 3 | Village |
| Danvers | 11 | 1,056 | 1,091 | -0.66% | 1,315 | 0.80 | Village |
| Colfax | 12 | 969 | 998 | -0.61% | 1,752 | 0.55 | Village |
| Saybrook | 13 | 635 | 654 | -0.63% | 792 | 0.80 | Village |
| Stanford | 14 | 577 | 599 | -0.69% | 872 | 0.66 | Village |
| Carlock | 15 | 562 | 547 | 0.54% | 1,423 | 0.40 | Village |
| Towanda | 16 | 416 | 430 | -0.72% | 559 | 0.74 | Village |
| Bellflower | 17 | 336 | 345 | -0.59% | 903 | 0.37 | Village |
| Arrowsmith | 18 | 266 | 276 | -0.75% | 1,350 | 0.20 | Village |
| Kappa | 19 | 227 | 231 | -0.44% | 636 | 0.36 | Village |
| Ellsworth | 20 | 178 | 182 | -0.56% | 820 | 0.22 | Village |
| Anchor | 21 | 157 | 161 | -0.63% | 918 | 0.17 | Village |
| Cooksville | 22 | 149 | 156 | -0.67% | 687 | 0.22 | Village |
| Shirley | 23 | 78 | 94 | 8.33% | 886 | 0.09 | CDP |
| Panola | 24 | 44 | 44 | 0% | 103 | 0.43 | Village |
Bloomington is the largest city in McLean County, with a population of 78,521.
Panola is the smallest city in McLean County.
There are 24 cities in McLean County, Illinois.