7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Alburgh town | 1 | 2,147 | 2,103 | -0.23% | 74 | 29.10 | Town |
| Grand Isle town | 2 | 2,113 | 2,078 | -0.52% | 129 | 16.41 | Town |
| South Hero town | 3 | 1,709 | 1,673 | -0.23% | 115 | 14.91 | Town |
| North Hero town | 4 | 961 | 938 | -0.1% | 71 | 13.45 | Town |
| Alburgh | 5 | 619 | 593 | 0.81% | 970 | 0.64 | Village |
| Isle La Motte town | 6 | 491 | 484 | -0.41% | 62 | 7.88 | Town |
| South Hero | 7 | 202 | 150 | 6.88% | 187 | 1.08 | CDP |
Alburgh town is the largest city in Grand Isle County, with a population of 2,147.
South Hero is the smallest city in Grand Isle County.
There are 7 cities in Grand Isle County, Vermont.