7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Pearsall | 1 | 9,729 | 8,776 | 1.97% | 1,486 | 7 | City |
| Pearsall | 2 | 9,729 | 8,786 | 1.97% | 1,486 | 7 | City |
| Dilley | 3 | 4,028 | 3,648 | 1.9% | 1,728 | 2 | City |
| Dilley | 4 | 4,028 | 3,653 | 1.9% | 1,728 | 2 | City |
| Bigfoot | 5 | 1,152 | 685 | 4.16% | 48 | 24 | CDP |
| North Pearsall | 6 | 735 | 480 | 1.1% | 516 | 1 | CDP |
| Hilltop | 7 | 261 | 196 | -0.38% | 208 | 1 | CDP |
Pearsall is the largest city in Frio County, with a population of 9,729.
Hilltop is the smallest city in Frio County, with a population of 261.
There are 7 cities in Frio County, Texas.