17 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Clinton | 1 | 9,108 | 8,896 | 0.91% | 201 | 45 | Township |
| Clinton | 2 | 4,889 | 4,843 | 0.31% | 137 | 36 | Township |
| Clinton | 3 | 4,800 | 4,805 | -0.02% | 2,131 | 2 | City |
| Helt | 4 | 2,520 | 2,445 | 1% | 35 | 72 | Township |
| Eugene | 5 | 1,765 | 1,714 | 1.03% | 51 | 35 | Township |
| Clinton | 6 | 1,531 | 1,556 | -0.26% | 44 | 34 | Township |
| Fairview Park | 7 | 1,425 | 1,401 | 0.28% | 1,630 | 1 | Town |
| Clinton | 8 | 1,311 | 1,232 | 0.85% | 37 | 35 | Township |
| Clinton | 9 | 959 | 913 | 1.37% | 30 | 32 | Township |
| Cayuga | 10 | 956 | 949 | 0.1% | 944 | 1 | Town |
| Vermillion | 11 | 878 | 856 | 1.04% | 17 | 51 | Township |
| Clinton | 12 | 568 | 577 | -0.53% | 23 | 25 | Township |
| Dana | 13 | 552 | 552 | 0% | 1,890 | 0 | Town |
| Clinton | 14 | 501 | 497 | 0.8% | 22 | 22 | Township |
| Perrysville | 15 | 464 | 454 | 0.43% | 1,805 | 0 | Town |
| Newport | 16 | 412 | 411 | 0% | 472 | 1 | Town |
| Universal | 17 | 285 | 281 | 0.35% | 792 | 0 | Town |
Clinton is the largest city in Vermillion County, with a population of 9,108.
Universal is the smallest city in Vermillion County, with a population of 285.
There are 17 cities in Vermillion County, Indiana.