5 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jacksonville | 1 | 1,038,787 | 951,925 | 1.41% | 1,390 | 747 | City |
| Jacksonville Beach | 2 | 23,538 | 23,814 | -0.2% | 3,216 | 7 | City |
| Atlantic Beach | 3 | 13,172 | 13,493 | -0.4% | 3,578 | 4 | City |
| Neptune Beach | 4 | 6,949 | 7,197 | -0.59% | 2,973 | 2 | City |
| Baldwin | 5 | 1,379 | 1,397 | -0.22% | 682 | 2 | Town |
Jacksonville is the largest city in Duval County, with a population of 1,038,787.
Baldwin is the smallest city in Duval County, with a population of 1,379.
There are 5 cities in Duval County, Florida.