| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Monticello | 1 | 2,808 | 2,594 | 1.48% | 700 | 4 | City |
Monticello is the largest city in Jefferson County, with a population of 2,808.
Monticello is the smallest city in Jefferson County, with a population of 2,808.
There is 1 city in Jefferson County, Florida.