5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jacksonville | 1 | 1,024,310 | 951,925 | 1.43% | 1,371 | 747 | City |
| Jacksonville Beach | 2 | 23,584 | 23,814 | -0.19% | 3,223 | 7 | City |
| Atlantic Beach | 3 | 13,225 | 13,493 | -0.41% | 3,593 | 4 | City |
| Neptune Beach | 4 | 6,990 | 7,197 | -0.6% | 2,991 | 2 | City |
| Baldwin | 5 | 1,382 | 1,397 | -0.22% | 684 | 2 | Town |
Jacksonville is the largest city in Duval County, with a population of 1,024,310.
Baldwin is the smallest city in Duval County, with a population of 1,382.
There are 5 cities in Duval County, Florida.