7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Rockport | 1 | 11,296 | 10,158 | 2.05% | 683 | 17 | City |
| Lamar | 2 | 1,790 | 1,073 | 4.5% | 585 | 3 | CDP |
| Fulton | 3 | 1,633 | 1,526 | 1.3% | 1,161 | 1 | Town |
| Taft Southwest | 4 | 1,470 | 1,440 | 0.07% | 2,843 | 1 | CDP |
| Tradewinds | 5 | 389 | 106 | 3.73% | 359 | 1 | CDP |
| Holiday Beach | 6 | 235 | 374 | -7.48% | 146 | 2 | CDP |
| Falman | 7 | 19 | 8 | 5.56% | 241 | 0 | CDP |
Rockport is the largest city in Aransas County, with a population of 11,296.
Falman is the smallest city in Aransas County, with a population of 19.
There are 7 cities in Aransas County, Texas.