17 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| San Diego | 1 | 3,588 | 3,746 | -0.88% | 1,887 | 2 | City |
| Freer | 2 | 2,326 | 2,454 | -1.11% | 564 | 4 | City |
| Benavides | 3 | 1,125 | 1,184 | -1.06% | 635 | 2 | City |
| Alice Acres | 4 | 1,096 | 282 | 3.79% | 186 | 6 | CDP |
| Rancho Alegre | 5 | 948 | 769 | -5.01% | 742 | 1 | CDP |
| South La Paloma | 6 | 776 | 389 | 3.74% | 700 | 1 | CDP |
| Coyote Acres | 7 | 720 | 1,215 | 1.98% | 140 | 5 | CDP |
| K-Bar Ranch | 8 | 674 | 362 | 3.22% | 200 | 3 | CDP |
| Amargosa | 9 | 382 | 302 | 1.6% | 286 | 1 | CDP |
| Alfred | 10 | 372 | 90 | 6.9% | 301 | 1 | CDP |
| Thompsonville | 11 | 184 | 190 | 6.98% | 47 | 4 | CDP |
| Owl Ranch | 12 | 91 | 286 | -9% | 123 | 1 | CDP |
| Realitos | 13 | 70 | 113 | -10.26% | 263 | 0 | CDP |
| South Fork Estates | 14 | 69 | 60 | 7.81% | 21 | 3 | CDP |
| Concepcion | 15 | 18 | 44 | 12.5% | 225 | 0 | CDP |
| Westdale | 16 | 12 | 93 | -66.67% | 3 | 4 | CDP |
| Las Lomitas | 17 | 9 | 64 | -64% | 2 | 4 | CDP |
San Diego is the largest city in Duval County, with a population of 3,588.
Las Lomitas is the smallest city in Duval County, with a population of 9.
There are 17 cities in Duval County, Texas.