19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Clinton township | 1 | 8,873 | 8,896 | -0.14% | 196 | 45.26 | Township |
| Clinton township | 2 | 4,812 | 4,839 | -0.17% | 135 | 35.73 | Township |
| Clinton | 3 | 4,773 | 4,815 | -0.17% | 2,119 | 2.25 | City |
| Helt township | 4 | 2,451 | 2,448 | -0.04% | 34 | 71.64 | Township |
| Eugene township | 5 | 1,711 | 1,719 | -0.18% | 49 | 34.93 | Township |
| Clinton township | 6 | 1,530 | 1,556 | -0.52% | 44 | 34.48 | Township |
| Fairview Park | 7 | 1,416 | 1,401 | 0.21% | 1,620 | 0.87 | Town |
| Clinton township | 8 | 1,326 | 1,235 | 1.38% | 38 | 35.13 | Township |
| Cayuga | 9 | 940 | 950 | -0.21% | 928 | 1.01 | Town |
| Clinton township | 10 | 931 | 911 | 0.65% | 29 | 32.43 | Township |
| Vermillion township | 11 | 855 | 859 | -0.12% | 17 | 50.51 | Township |
| St. Bernice | 12 | 590 | 721 | -0.67% | 462 | 1.28 | CDP |
| Clinton township | 13 | 581 | 577 | 0.35% | 23 | 24.73 | Township |
| Dana | 14 | 545 | 554 | -0.37% | 1,866 | 0.29 | Town |
| Clinton township | 15 | 484 | 496 | -0.41% | 22 | 22.47 | Township |
| Perrysville | 16 | 459 | 454 | 0.22% | 1,786 | 0.26 | Town |
| Newport | 17 | 409 | 414 | -0.24% | 469 | 0.87 | Town |
| Universal | 18 | 281 | 281 | 0% | 781 | 0.36 | Town |
| Blanford | 19 | 110 | 248 | -12% | 259 | 0.42 | CDP |
Clinton township is the largest city in Vermillion County, with a population of 8,873.
Blanford is the smallest city in Vermillion County.
There are 19 cities in Vermillion County, Indiana.