3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Goldthwaite | 1 | 1,777 | 1,726 | 0.57% | 880 | 2 | City |
| Priddy | 2 | 139 | 154 | 6.92% | 35 | 4 | CDP |
| Mullin | 3 | 128 | 128 | 0% | 274 | 0 | Town |
Goldthwaite is the largest city in Mills County, with a population of 1,777.
Mullin is the smallest city in Mills County, with a population of 128.
There are 3 cities in Mills County, Texas.