| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jacksonville | 1 | 1,032,061 | 951,880 | 1.41% | 1,381 | 747 | City |
| Jacksonville Beach | 2 | 23,572 | 23,819 | -0.18% | 3,221 | 7 | City |
| Atlantic Beach | 3 | 13,190 | 13,500 | -0.42% | 3,583 | 4 | City |
| Neptune Beach | 4 | 6,980 | 7,194 | -0.57% | 2,987 | 2 | City |
| Baldwin | 5 | 1,391 | 1,407 | -0.22% | 688 | 2 | Town |
Jacksonville is the largest city in Duval County, with a population of 1,032,061.
Baldwin is the smallest city in Duval County, with a population of 1,391.
There are 5 cities in Duval County, Florida.