| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sebastian | 1 | 27,817 | 25,115 | 1.7% | 1,598 | 17 | City |
| Vero Beach | 2 | 17,874 | 16,430 | 1.54% | 1,554 | 11 | City |
| Fellsmere | 3 | 5,061 | 4,830 | 0.72% | 88 | 58 | City |
| Indian River Shores | 4 | 4,516 | 4,254 | 1.1% | 881 | 5 | Town |
| Orchid | 5 | 561 | 522 | 1.26% | 454 | 1 | Town |
Sebastian is the largest city in Indian River County, with a population of 27,817.
Orchid is the smallest city in Indian River County, with a population of 561.
There are 5 cities in Indian River County, Florida.