21 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Danville | 1 | 27,408 | 29,127 | -1.03% | 1,535 | 18 | City |
| Hoopeston | 2 | 4,586 | 4,900 | -1.12% | 1,244 | 4 | City |
| Westville | 3 | 2,969 | 3,166 | -1.1% | 1,769 | 2 | Village |
| Georgetown | 4 | 2,935 | 3,133 | -1.11% | 1,816 | 2 | City |
| Tilton | 5 | 2,481 | 2,637 | -1.04% | 653 | 4 | Village |
| Catlin | 6 | 1,885 | 1,987 | -0.89% | 2,220 | 1 | Village |
| Oakwood | 7 | 1,251 | 1,323 | -0.95% | 1,348 | 1 | Village |
| Rossville | 8 | 1,135 | 1,216 | -1.13% | 812 | 1 | Village |
| Ridge Farm | 9 | 735 | 789 | -1.21% | 241 | 3 | Village |
| Potomac | 10 | 641 | 685 | -1.08% | 1,314 | 0 | Village |
| Fairmount | 11 | 576 | 614 | -1.03% | 1,817 | 0 | Village |
| Bismarck | 12 | 562 | 583 | -0.53% | 756 | 1 | Village |
| Rankin | 13 | 464 | 494 | -1.07% | 801 | 1 | Village |
| Fithian | 14 | 463 | 493 | -1.07% | 1,209 | 0 | Village |
| Sidell | 15 | 456 | 489 | -1.08% | 492 | 1 | Village |
| Belgium | 16 | 337 | 358 | -0.88% | 776 | 0 | Village |
| Allerton | 17 | 247 | 265 | -1.2% | 364 | 1 | Village |
| Alvan (Alvin) | 18 | 219 | 234 | -0.9% | 276 | 1 | Village |
| Indianola | 19 | 215 | 227 | -0.92% | 554 | 0 | Village |
| Henning | 20 | 197 | 209 | -1.01% | 129 | 2 | Village |
| Muncie | 21 | 144 | 156 | -1.37% | 804 | 0 | Village |
Danville is the largest city in Vermilion County, with a population of 27,408.
Muncie is the smallest city in Vermilion County, with a population of 144.
There are 21 cities in Vermilion County, Illinois.